def main():
usage = 'usage: %prog [options] <hdf5_file>'
parser = OptionParser(usage)
parser.add_option('-s', dest='set', default='test', help='Set (train/valid/test) [Default: %default]')
(options,args) = parser.parse_args()
if len(args) != 1:
parser.error('Must provide data HDF5 file')
else:
hdf5_file = args[0]
# load 1 hot coded seqeunces from HDF5
hdf5_in = h5py.File(hdf5_file, 'r')
seqs_1hot = np.array(hdf5_in['%s_in' % options.set])
seq_headers = np.array(hdf5_in['test_headers'])
hdf5_in.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
for i, seq in enumerate(seqs):
if seq_headers is None:
header = 'seq%d' % i
else:
header = seq_headers[i]
print '>%s\n%s' % (header, seq)
def main():
usage = 'usage: %prog [options] <hdf5_file>'
parser = OptionParser(usage)
parser.add_option('-s',
dest='set',
default='test',
help='Set (train/valid/test) [Default: %default]')
(options, args) = parser.parse_args()
if len(args) != 1:
parser.error(
'Must provide Basset model file and input sequences (as a FASTA file or test data in an HDF file'
)
else:
hdf5_file = args[0]
# load 1 hot coded seqeunces from HDF5
hdf5_in = h5py.File(hdf5_file, 'r')
seqs_1hot = np.array(hdf5_in['%s_in' % options.set])
try:
seq_headers = np.array(hdf5_in['test_headers'])
except:
seq_headers = None
hdf5_in.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
for i, seq in enumerate(seqs):
if seq_headers is None:
header = 'seq%d' % i
else:
header = seq_headers[i]
print '>%s\n%s' % (header, seq)
def main():
usage = "usage: %prog [options] <hdf5_file>"
parser = OptionParser(usage)
parser.add_option("-s", dest="set", default="test", help="Set (train/valid/test) [Default: %default]")
(options, args) = parser.parse_args()
if len(args) != 1:
parser.error("Must provide Basset model file and input sequences (as a FASTA file or test data in an HDF file")
else:
hdf5_file = args[0]
# load 1 hot coded seqeunces from HDF5
hdf5_in = h5py.File(hdf5_file, "r")
seqs_1hot = np.array(hdf5_in["%s_in" % options.set])
try:
seq_headers = np.array(hdf5_in["test_headers"])
except:
seq_headers = None
hdf5_in.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
for i, seq in enumerate(seqs):
if seq_headers is None:
header = "seq%d" % i
else:
header = seq_headers[i]
print ">%s\n%s" % (header, seq)
def plot_weight_logo(filter_weights,
seq_tensor,
norm_beta,
norm_gamma,
norm_mean,
norm_var,
out_prefix,
maxpct_t=0.0):
#Get convolution
kmer_conv = np.tensordot(filter_weights, seq_tensor,
axes=((0, 1), (1, 2))) #result in a 1D array
#normalization using trained parameters
kmer_conv_norm = (kmer_conv - norm_mean
) * norm_beta / np.sqrt(norm_var + 0.00001) + norm_gamma
#ReLU
kmer_conv_relu = [0 if val < 0 else val for val in kmer_conv_norm]
#calculate a ReLU cutoff to plot weblogo
if maxpct_t == 0:
relu_act = 0
else:
all_outs = np.ravel(kmer_conv_relu)
all_outs_mean = all_outs.mean()
all_outs_norm = all_outs - all_outs_mean
relu_act = maxpct_t * all_outs_norm.max() + all_outs_mean
#Find which kmer pass the cutoff
kmer_ok_index = [
i for i in range(len(kmer_conv_relu)) if kmer_conv_relu[i] > relu_act
]
if len(kmer_ok_index) > 0:
kmer_ok = np.array([seq_tensor[i, :, :]
for i in kmer_ok_index]) #shape (50,4,5)
kmer_ok_4D = np.expand_dims(kmer_ok, axis=2) #shape (50,4,1,5)
kmer_seq = dna_io.vecs2dna(kmer_ok_4D)
kmer_fasta = [
">" + str(i) + "\n" + seq + "\n"
for i, seq in zip(range(len(kmer_seq)), kmer_seq)
]
kmer_fasta_out = open("%s_activated_kmers.fa" % out_prefix, "w")
kmer_fasta_out.writelines(kmer_fasta)
kmer_fasta_out.close()
if relu_act > 0:
subprocess.call(
"weblogo -X NO -Y NO -F pdf --resolution 300 --errorbars NO --fineprint '' -C '#CB2026' A A -C '#34459C' C C -C '#FBB116' G G -C '#0C8040' T T < %s_activated_kmers.fa > %s_weight_LOGO.pdf"
% (out_prefix, out_prefix),
shell=True)
else:
subprocess.call(
"weblogo -U probability -F pdf --resolution 300 --errorbars NO --fineprint '' -C '#CB2026' A A -C '#34459C' C C -C '#FBB116' G G -C '#0C8040' T T < %s_activated_kmers.fa > %s_weight_LOGO.pdf"
% (out_prefix, out_prefix),
shell=True)
def parse_filter_scores_multiple_base_hdf5(scores_hdf5_file):
### single motif scores = [activation for each filter][base_seq]
### paired motif scores = activation for [filter1][filter2][base_seq]
### seqs = motif that is used to represent each filter
scores_hdf5_in = h5py.File(scores_hdf5_file, 'r')
preds = np.array(scores_hdf5_in['preds'])
seq_vecs = scores_hdf5_in['seqs']
# print preds.shape
# print seq_vecs.shape
seqs = dna_io.vecs2dna(seq_vecs)
scores_hdf5_in.close()
assert(NUM_BASE_SEQS + NUM_BASE_SEQS * NUM_SEQS + NUM_BASE_SEQS * NUM_SEQS * NUM_SEQS == len(preds))
num_seqs= NUM_SEQS
base_scores = []
single_motif_scores = []
paired_motif_scores = []
for i in range(num_seqs):
single_motif_scores.append([False] * NUM_BASE_SEQS)
paired_motif_scores.append([])
for j in range(num_seqs):
paired_motif_scores[i].append([False] * NUM_BASE_SEQS)
z = 0
for i in range(NUM_BASE_SEQS):
base_scores.append(preds[i])
base_seqs.append(seqs[i])
z += 1
motif_seqs = []
for i in range(NUM_SEQS):
motif_seqs.append(seqs[z][300:319])
for j in range(NUM_BASE_SEQS):
single_motif_scores[i][j] = preds[z]
z += 1
for i in range(num_seqs):
for j in range(num_seqs):
for k in range(NUM_BASE_SEQS):
paired_motif_scores[i][j][k] = preds[z]
z += 1
return (base_seqs, base_scores, single_motif_scores, paired_motif_scores, motif_seqs)
def parse_filter_scores_hdf5(scores_hdf5_file):
### single motif scores = [activation for each filter]
### paired motif scores = activation for [filter1][filter2][offset]
### seqs = motif that is used to represent each filter
scores_hdf5_in = h5py.File(scores_hdf5_file, 'r')
preds = np.array(scores_hdf5_in['preds'])
seq_vecs = scores_hdf5_in['seqs']
print preds.shape
print seq_vecs.shape
seqs = dna_io.vecs2dna(seq_vecs)
scores_hdf5_in.close()
# num_seqs = len(seqs)
assert(NUM_SEQS + WINDOW_SIZE * NUM_SEQS * NUM_SEQS == len(preds))
num_seqs= NUM_SEQS
window_size = WINDOW_SIZE
# window_size = (len(preds) - num_seqs) / (num_seqs * num_seqs)
single_motif_scores = []
paired_motif_scores = []
for i in range(num_seqs):
paired_motif_scores.append([])
for j in range(num_seqs):
paired_motif_scores[i].append([False] * window_size)
for i in range(num_seqs):
single_motif_scores.append(preds[i])
z = num_seqs
for i in range(num_seqs):
for j in range(num_seqs):
for k in range(window_size):
paired_motif_scores[i][j][k] = preds[z]
z += 1
return (single_motif_scores, paired_motif_scores, seqs)
def main():
usage = 'usage: %prog [options] <model_file>'
parser = OptionParser(usage)
parser.add_option(
'-a',
dest='targets_file',
default=None,
help='File labelings targets in the second column [Default: %default]')
parser.add_option(
'-c',
dest='center_nt',
default=50,
help='Center nt to consider kmers from [Default: %default]')
parser.add_option('-d',
dest='model_out_file',
default=None,
help='Pre-computed model output table.')
parser.add_option('-k',
dest='kmer',
default=8,
type='int',
help='K-mer length [Default: %default]')
parser.add_option('-l',
dest='seq_len',
default=1000,
type='int',
help='Input sequence length [Default: %default]')
parser.add_option(
'-n',
dest='num_seqs',
default=100000,
type='int',
help='Number of sequences to predict [Default: %default]')
parser.add_option('-o', dest='out_dir', default='.')
parser.add_option(
'-r',
dest='rc',
default=False,
action='store_true',
help='Consider k-mers w/ their reverse complements [Default: %default]'
)
parser.add_option(
'-t',
dest='targets',
default=None,
help=
'Comma-separated list of targets to analyze in more depth [Default: %default]'
)
parser.add_option(
'--top',
dest='top_num',
default=100,
type='int',
help=
'Number of sequences with which to make a multiple sequence alignment')
(options, args) = parser.parse_args()
if len(args) != 1:
parser.error('Must provide Basset model file.')
else:
model_file = args[0]
random.seed(2)
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
if options.model_out_file is not None:
seq_dna = []
for line in open('%s/seqs.fa' % options.out_dir):
if line[0] == '>':
seq_dna.append('')
else:
seq_dna[-1] += line.rstrip()
else:
#################################################################
# generate random sequences
#################################################################
# random sequences
seq_vecs = np.zeros((options.num_seqs, 4, 1, options.seq_len),
dtype='float16')
for si in range(options.num_seqs):
for li in range(options.seq_len):
ni = random.randint(0, 3)
seq_vecs[si, ni, 0, li] = 1
# create a new HDF5 file
seq_hdf5_file = '%s/seqs.h5' % options.out_dir
seq_hdf5_out = h5py.File(seq_hdf5_file, 'w')
seq_hdf5_out.create_dataset('test_in', data=seq_vecs)
seq_hdf5_out.close()
# get fasta
seq_dna = vecs2dna(seq_vecs)
# print to file
fasta_out = open('%s/seqs.fa' % options.out_dir, 'w')
for i in range(len(seq_dna)):
print >> fasta_out, '>%d\n%s' % (i, seq_dna[i])
fasta_out.close()
#################################################################
# Torch predict
#################################################################
options.model_out_file = '%s/model_out.txt' % options.out_dir
torch_cmd = 'basset_predict.lua -scores %s %s %s' % (
model_file, seq_hdf5_file, options.model_out_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# clean up sequence HDF5
os.remove(seq_hdf5_file)
# load scores
seq_scores = np.loadtxt(options.model_out_file, dtype='float32')
# read target labels
if options.targets_file:
target_labels = [
line.split()[1] for line in open(options.targets_file)
]
else:
target_labels = ['t%d' % (ti + 1) for ti in range(seq_scores.shape[1])]
if options.targets is None:
options.targets = range(seq_scores.shape[1])
else:
options.targets = [int(ti) for ti in options.targets.split(',')]
#################################################################
# process and output
#################################################################
kmers_start = (options.seq_len - options.center_nt) / 2
for ti in options.targets:
print 'Working on target %d' % ti
##############################################
# hash scores by k-mer
##############################################
kmer_scores_raw = {}
for si in range(len(seq_dna)):
# get score
sscore = seq_scores[si, ti]
# hash to each center kmer
for ki in range(kmers_start, kmers_start + options.center_nt):
kmer = seq_dna[si][ki:ki + options.kmer]
if options.rc:
kmer = consider_rc(kmer)
kmer_scores_raw.setdefault(kmer, []).append(sscore)
##############################################
# compute means and print table
##############################################
table_out = open('%s/table%d.txt' % (options.out_dir, ti), 'w')
kmer_means_raw = {}
for kmer in kmer_scores_raw:
kmer_means_raw[kmer] = np.mean(kmer_scores_raw[kmer])
kmer_n = len(kmer_scores_raw[kmer])
cols = (kmer, kmer_n, kmer_means_raw[kmer],
np.std(kmer_scores_raw[kmer]) / math.sqrt(kmer_n))
print >> table_out, '%s %4d %6.3f %6.3f' % cols
table_out.close()
##############################################
# plot density
##############################################
plt.figure()
sns.distplot(kmer_means_raw.values(), kde=False)
plt.savefig('%s/density%d.pdf' % (options.out_dir, ti))
plt.close()
##############################################
# top k-mers distance matrix
##############################################
kmer_means = {}
kmer_means_mean = np.mean(kmer_means_raw.values())
for kmer in kmer_means_raw:
kmer_means[kmer] = kmer_means_raw[kmer] - kmer_means_mean
# score by score
scores_kmers = [(kmer_means[kmer], kmer) for kmer in kmer_means]
scores_kmers.sort(reverse=True)
# take top k-mers
top_kmers = []
top_kmers_scores = []
for score, kmer in scores_kmers[:options.top_num]:
top_kmers.append(kmer)
top_kmers_scores.append(score)
top_kmers = np.array(top_kmers)
top_kmers_scores = np.array(top_kmers_scores)
# compute distance matrix
top_kmers_dists = np.zeros((options.top_num, options.top_num))
for i in range(options.top_num):
for j in range(i + 1, options.top_num):
if options.rc:
top_kmers_dists[i, j] = kmer_distance_rc(
top_kmers[i], top_kmers[j])
else:
top_kmers_dists[i,
j] = kmer_distance(top_kmers[i],
top_kmers[j])
top_kmers_dists[j, i] = top_kmers_dists[i, j]
# clip the distances
np.clip(top_kmers_dists, 0, 3, out=top_kmers_dists)
# plot
plot_kmer_dists(top_kmers_dists, top_kmers_scores, top_kmers,
'%s/top_kmers_heat%d.pdf' % (options.out_dir, ti))
# cluster and plot
cluster_kmer_dists(top_kmers_dists, top_kmers_scores, top_kmers,
'%s/top_kmers_clust%d.pdf' % (options.out_dir, ti))
def main():
usage = 'usage: %prog [options] <model_file> <test_hdf5_file>'
parser = OptionParser(usage)
parser.add_option('-d', dest='model_hdf5_file', default=None, help='Pre-computed model output as HDF5.')
parser.add_option('-o', dest='out_dir', default='.')
parser.add_option('-m', dest='meme_db', default='%s/data/motifs/Homo_sapiens.meme' % os.environ['BASSETDIR'], help='MEME database used to annotate motifs')
parser.add_option('-s', dest='sample', default=None, type='int', help='Sample sequences from the test set [Default:%default]')
parser.add_option('-t', dest='trim_filters', default=False, action='store_true', help='Trim uninformative positions off the filter ends [Default: %default]')
parser.add_option('--skip-heat', dest='skip_heat', default=False, help="Skip plotting heat maps of filters")
parser.add_option('--skip-logo', dest='skip_logo', default=False, help="Skip Weblogo plots for filters")
(options,args) = parser.parse_args()
if len(args) != 2:
parser.error('Must provide Basset model file and test data in HDF5 format.')
else:
model_file = args[0]
test_hdf5_file = args[1]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# load data
#################################################################
# load sequences
test_hdf5_in = h5py.File(test_hdf5_file, 'r')
seq_vecs = np.array(test_hdf5_in['test_in'])
# print seq_vecs.shape
# print "with numpy", seq_vecs.nbytes
seq_targets = np.array(test_hdf5_in['test_out'])
try:
target_names = list(test_hdf5_in['target_labels'])
except KeyError:
target_names = ['t%d'%ti for ti in range(seq_targets.shape[1])]
test_hdf5_in.close()
#################################################################
# sample
#################################################################
if options.model_hdf5_file is not None:
print "Model outs file specified. Do not resample, use sample sequences from model outs file."
else:
if options.sample is not None:
# choose sampled indexes
sample_i = np.array(random.sample(xrange(seq_vecs.shape[0]), options.sample))
# filter
seq_vecs = seq_vecs[sample_i]
seq_targets = seq_targets[sample_i]
# create a new HDF5 file
sample_hdf5_file = '%s/sample.h5' % options.out_dir
sample_hdf5_out = h5py.File(sample_hdf5_file, 'w')
print seq_vecs.shape
sample_hdf5_out.create_dataset('test_in', data=seq_vecs)
sample_hdf5_out.close()
# update test HDF5
test_hdf5_file = sample_hdf5_file
print "Finished creating sample file"
#################################################################
# Torch predict
#################################################################
if options.model_hdf5_file is None:
print "No model hdf5 file specified"
options.model_hdf5_file = '%s/model_out.h5' % options.out_dir
torch_cmd = 'basset_motifs_predict.lua %s %s %s' % (model_file, test_hdf5_file, options.model_hdf5_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# load model output
model_hdf5_in = h5py.File(options.model_hdf5_file, 'r')
filter_weights = np.array(model_hdf5_in['weights'])
filter_outs = np.array(model_hdf5_in['outs']) #
seq_vecs = model_hdf5_in['sample_seqs']
seqs = dna_io.vecs2dna(seq_vecs)
model_hdf5_in.close()
# store useful variables
num_filters = filter_weights.shape[0]
filter_size = filter_weights.shape[2]
#################################################################
# individual filter plots
#################################################################
# also save information contents
filters_ic = []
meme_out_file = meme_intro('%s/filters_meme.txt'%options.out_dir, seqs)
for f in range(num_filters):
print 'Filter %d' % f
# plot filter parameters as a heatmap
if not options.skip_heat:
plot_filter_heat(filter_weights[f,:,:], '%s/filter%d_heat.pdf' % (options.out_dir,f))
# plot weblogo of high scoring outputs
if not options.skip_logo:
plot_filter_logo(filter_outs[:,f,:], filter_size, seqs, '%s/filter%d_logo'%(options.out_dir,f), maxpct_t=0.5)
# make a PWM for the filter
filter_pwm, nsites = make_filter_pwm('%s/filter%d_logo.fa'%(options.out_dir,f))
if nsites < 10:
# no information
filters_ic.append(0)
print "No information"
else:
# compute and save information content
filters_ic.append(info_content(filter_pwm))
# add to the meme motif file
meme_add(meme_out_file, f, filter_pwm, nsites, options.trim_filters)
meme_out_file.close()
#################################################################
# annotate filters
#################################################################
# run tomtom
subprocess.call('tomtom -dist pearson -thresh 0.1 -oc %s/tomtom %s/filters_meme.txt %s' % (options.out_dir, options.out_dir, options.meme_db), shell=True)
# read in annotations
filter_names = name_filters(num_filters, '%s/tomtom/tomtom.txt'%options.out_dir, options.meme_db)
#################################################################
# print a table of information
#################################################################
table_out = open('%s/table.txt'%options.out_dir, 'w')
# print header for later panda reading
header_cols = ('', 'consensus', 'annotation', 'ic', 'mean', 'std')
print >> table_out, '%3s %19s %10s %5s %6s %6s' % header_cols
for f in range(num_filters):
# collapse to a consensus motif
consensus = filter_motif(filter_weights[f,:,:])
# grab annotation
annotation = '.'
name_pieces = filter_names[f].split('_')
if len(name_pieces) > 1:
annotation = name_pieces[1]
# plot density of filter output scores
fmean, fstd = plot_score_density(np.ravel(filter_outs[:,f,:]), '%s/filter%d_dens.pdf' % (options.out_dir,f))
row_cols = (f, consensus, annotation, filters_ic[f], fmean, fstd)
print >> table_out, '%-3d %19s %10s %5.2f %6.4f %6.4f' % row_cols
table_out.close()
#################################################################
# global filter plots
#################################################################
# plot filter-sequence heatmap
plot_filter_seq_heat(filter_outs, '%s/filter_seqs.pdf'%options.out_dir)
# plot filter-segment heatmap
plot_filter_seg_heat(filter_outs, '%s/filter_segs.pdf'%options.out_dir)
plot_filter_seg_heat(filter_outs, '%s/filter_segs_raw.pdf'%options.out_dir, whiten=False)
# plot filter-target correlation heatmap
plot_target_corr(filter_outs, seq_targets, filter_names, target_names, '%s/filter_target_cors_mean.pdf'%options.out_dir, 'mean')
plot_target_corr(filter_outs, seq_targets, filter_names, target_names, '%s/filter_target_cors_max.pdf'%options.out_dir, 'max')
def main():
usage = 'usage: %prog [options] <model_file> <input_file>'
parser = OptionParser(usage)
parser.add_option('-a', dest='input_activity_file', help='Optional activity table corresponding to an input FASTA file')
parser.add_option('-d', dest='model_hdf5_file', default=None, help='Pre-computed model output as HDF5 [Default: %default]')
parser.add_option('-g', dest='gain_height', default=False, action='store_true', help='Nucleotide heights determined by the max of loss and gain [Default: %default]')
parser.add_option('-m', dest='min_limit', default=0.1, type='float', help='Minimum heatmap limit [Default: %default]')
parser.add_option('-n', dest='center_nt', default=0, type='int', help='Center nt to mutate and plot in the heat map [Default: %default]')
parser.add_option('-o', dest='out_dir', default='heat', help='Output directory [Default: %default]')
parser.add_option('-p', dest='print_table_all', default=False, action='store_true', help='Print all targets to the table [Default: %default]')
parser.add_option('-r', dest='rng_seed', default=1, type='float', help='Random number generator seed [Default: %default]')
parser.add_option('-s', dest='sample', default=None, type='int', help='Sample sequences from the test set [Default:%default]')
parser.add_option('-t', dest='targets', default='0', help='Comma-separated list of target indexes to plot (or -1 for all) [Default: %default]')
(options,args) = parser.parse_args()
if len(args) != 2:
parser.error('Must provide Basset model file and input sequences (as a FASTA file or test data in an HDF file')
else:
model_file = args[0]
input_file = args[1]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
random.seed(options.rng_seed)
#################################################################
# parse input file
#################################################################
try:
# input_file is FASTA
# load sequences and headers
seqs = []
seq_headers = []
for line in open(input_file):
if line[0] == '>':
seq_headers.append(line[1:].rstrip())
seqs.append('')
else:
seqs[-1] += line.rstrip()
model_input_hdf5 = '%s/model_in.h5'%options.out_dir
if options.input_activity_file:
# one hot code
seqs_1hot, targets = dna_io.load_data_1hot(input_file, options.input_activity_file, mean_norm=False, whiten=False, permute=False, sort=False)
# read in target names
target_labels = open(options.input_activity_file).readline().strip().split('\t')
else:
# load sequences
seqs_1hot = dna_io.load_sequences(input_file, permute=False)
targets = None
target_labels = None
# sample
if options.sample:
sample_i = np.array(random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
if targets is not None:
targets = targets[sample_i]
# reshape sequences for torch
seqs_1hot = seqs_1hot.reshape((seqs_1hot.shape[0],4,1,seqs_1hot.shape[1]/4))
# write as test data to a HDF5 file
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
except (IOError, IndexError):
# input_file is HDF5
try:
model_input_hdf5 = input_file
# load (sampled) test data from HDF5
hdf5_in = h5py.File(input_file, 'r')
seqs_1hot = np.array(hdf5_in['test_in'])
targets = np.array(hdf5_in['test_out'])
try: # TEMP
seq_headers = np.array(hdf5_in['test_headers'])
target_labels = np.array(hdf5_in['target_labels'])
except:
seq_headers = None
target_labels = None
hdf5_in.close()
# sample
if options.sample:
sample_i = np.array(random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
targets = targets[sample_i]
# write sampled data to a new HDF5 file
model_input_hdf5 = '%s/model_in.h5'%options.out_dir
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
except IOError:
parser.error('Could not parse input file as FASTA or HDF5.')
#################################################################
# Torch predict modifications
#################################################################
if options.model_hdf5_file is None:
options.model_hdf5_file = '%s/model_out.h5' % options.out_dir
torch_cmd = 'basset_sat_predict.lua -center_nt %d %s %s %s' % (options.center_nt, model_file, model_input_hdf5, options.model_hdf5_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
#################################################################
# load modification predictions
#################################################################
hdf5_in = h5py.File(options.model_hdf5_file, 'r')
seq_mod_preds = np.array(hdf5_in['seq_mod_preds'])
hdf5_in.close()
# trim seqs to match seq_mod_preds length
seq_len = len(seqs[0])
delta_start = 0
delta_len = seq_mod_preds.shape[2]
if delta_len < seq_len:
delta_start = (seq_len - delta_len)/2
for i in range(len(seqs)):
seqs[i] = seqs[i][delta_start:delta_start+delta_len]
# decide which cells to plot
if options.targets == '-1':
plot_targets = xrange(seq_mod_preds.shape[3])
else:
plot_targets = [int(ci) for ci in options.targets.split(',')]
#################################################################
# plot
#################################################################
table_out = open('%s/table.txt' % options.out_dir, 'w')
rdbu = sns.color_palette("RdBu_r", 10)
nts = 'ACGT'
for si in range(seq_mod_preds.shape[0]):
try:
header = seq_headers[si]
except TypeError:
header = 'seq%d' % si
seq = seqs[si]
# plot some descriptive heatmaps for each individual cell type
for ci in plot_targets:
seq_mod_preds_cell = seq_mod_preds[si,:,:,ci]
real_pred_cell = get_real_pred(seq_mod_preds_cell, seq)
# compute matrices
norm_matrix = seq_mod_preds_cell - real_pred_cell
min_scores = seq_mod_preds_cell.min(axis=0)
max_scores = seq_mod_preds_cell.max(axis=0)
minmax_matrix = np.vstack([min_scores - real_pred_cell, max_scores - real_pred_cell])
# prepare figure
sns.set(style='white', font_scale=0.5)
sns.axes_style({'axes.linewidth':1})
heat_cols = 400
sad_start = 1
sad_end = 323
logo_start = 0
logo_end = 324
fig = plt.figure(figsize=(20,3))
ax_logo = plt.subplot2grid((3,heat_cols), (0,logo_start), colspan=(logo_end-logo_start))
ax_sad = plt.subplot2grid((3,heat_cols), (1,sad_start), colspan=(sad_end-sad_start))
ax_heat = plt.subplot2grid((3,heat_cols), (2,0), colspan=heat_cols)
# print a WebLogo of the sequence
vlim = max(options.min_limit, abs(minmax_matrix).max())
if options.gain_height:
seq_heights = 0.25 + 1.75/vlim*(abs(minmax_matrix).max(axis=0))
else:
seq_heights = 0.25 + 1.75/vlim*(-minmax_matrix[0])
logo_eps = '%s/%s_c%d_seq.eps' % (options.out_dir, header_filename(header), ci)
seq_logo(seq, seq_heights, logo_eps)
# add to figure
logo_png = '%s.png' % logo_eps[:-4]
subprocess.call('convert -density 300 %s %s' % (logo_eps, logo_png), shell=True)
logo = Image.open(logo_png)
ax_logo.imshow(logo)
ax_logo.set_axis_off()
# plot loss and gain SAD scores
ax_sad.plot(-minmax_matrix[0], c=rdbu[0], label='loss', linewidth=1)
ax_sad.plot(minmax_matrix[1], c=rdbu[-1], label='gain', linewidth=1)
ax_sad.set_xlim(0,minmax_matrix.shape[1])
ax_sad.legend()
# ax_sad.grid(True, linestyle=':')
for axis in ['top','bottom','left','right']:
ax_sad.spines[axis].set_linewidth(0.5)
# plot real-normalized scores
vlim = max(options.min_limit, abs(norm_matrix).max())
sns.heatmap(norm_matrix, linewidths=0, cmap='RdBu_r', vmin=-vlim, vmax=vlim, xticklabels=False, ax=ax_heat)
ax_heat.yaxis.set_ticklabels('TGCA', rotation='horizontal') # , size=10)
# save final figure
plt.tight_layout()
plt.savefig('%s/%s_c%d_heat.pdf' % (options.out_dir,header.replace(':','_'), ci), dpi=300)
plt.close()
#################################################################
# print table of nt variability for each cell
#################################################################
print_targets = plot_targets
if options.print_table_all:
print_targets = range(seq_mod_preds.shape[3])
for ci in print_targets:
seq_mod_preds_cell = seq_mod_preds[si,:,:,ci]
real_pred_cell = get_real_pred(seq_mod_preds_cell, seq)
min_scores = seq_mod_preds_cell.min(axis=0)
max_scores = seq_mod_preds_cell.max(axis=0)
loss_matrix = real_pred_cell - seq_mod_preds_cell.min(axis=0)
gain_matrix = seq_mod_preds_cell.max(axis=0) - real_pred_cell
for pos in range(seq_mod_preds_cell.shape[1]):
cols = [header, delta_start+pos, ci, loss_matrix[pos], gain_matrix[pos]]
print >> table_out, '\t'.join([str(c) for c in cols])
table_out.close()
def main():
usage = 'usage: %prog [options] <model_file>'
parser = OptionParser(usage)
parser.add_option('-a', dest='targets_file', default=None, help='File labelings targets in the second column [Default: %default]')
parser.add_option('-c', dest='center_nt', default=50, help='Center nt to consider kmers from [Default: %default]')
parser.add_option('-d', dest='model_out_file', default=None, help='Pre-computed model output table.')
parser.add_option('-k', dest='kmer', default=8, type='int', help='K-mer length [Default: %default]')
parser.add_option('-l', dest='seq_len', default=1000, type='int', help='Input sequence length [Default: %default]')
parser.add_option('-n', dest='num_seqs', default=100000, type='int', help='Number of sequences to predict [Default: %default]')
parser.add_option('-o', dest='out_dir', default='.')
parser.add_option('-r', dest='rc', default=False, action='store_true', help='Consider k-mers w/ their reverse complements [Default: %default]')
parser.add_option('-t', dest='targets', default=None, help='Comma-separated list of targets to analyze in more depth [Default: %default]')
(options,args) = parser.parse_args()
if len(args) != 1:
parser.error('Must provide Basset model file.')
else:
model_file = args[0]
random.seed(2)
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# generate random sequences
#################################################################
# random sequences
seq_vecs = np.zeros((options.num_seqs,4,1,options.seq_len), dtype='float16')
for si in range(options.num_seqs):
for li in range(options.seq_len):
ni = random.randint(0,3)
seq_vecs[si,ni,0,li] = 1
# create a new HDF5 file
seq_hdf5_file = '%s/seqs.h5' % options.out_dir
seq_hdf5_out = h5py.File(seq_hdf5_file, 'w')
seq_hdf5_out.create_dataset('test_in', data=seq_vecs)
seq_hdf5_out.close()
# get fasta
seq_dna = vecs2dna(seq_vecs)
#################################################################
# Torch predict
#################################################################
if options.model_out_file is None:
options.model_out_file = '%s/model_out.txt' % options.out_dir
torch_cmd = 'basset_predict.lua -scores %s %s %s' % (model_file, seq_hdf5_file, options.model_out_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# load scores
seq_scores = np.loadtxt(options.model_out_file, dtype='float32')
# read target labels
if options.targets_file:
target_labels = [line.split()[1] for line in open(options.targets_file)]
else:
target_labels = ['t%d'%(ti+1) for ti in range(seq_scores.shape[1])]
if options.targets == None:
options.targets = range(seq_scores.shape[1])
#################################################################
# process and output
#################################################################
kmers_start = (options.seq_len - options.center_nt) / 2
for ti in options.targets:
##############################################
# hash scores by k-mer
##############################################
kmer_scores = {}
for si in range(len(seq_dna)):
# get score
sscore = seq_scores[si,ti]
# hash to each center kmer
for ki in range(kmers_start, kmers_start + options.center_nt):
kmer = seq_dna[si][ki:ki+options.kmer]
if options.rc:
kmer = consider_rc(kmer)
kmer_scores.setdefault(kmer,[]).append(sscore)
##############################################
# print table
##############################################
table_out = open('%s/table%d.txt' % (options.out_dir,ti), 'w')
for kmer in kmer_scores:
cols = (kmer, len(kmer_scores[kmer]), np.mean(kmer_scores[kmer]), np.std(kmer_scores[kmer])/math.sqrt(len(kmer_scores[kmer])))
print >> table_out, '%s %4d %6.3f %6.3f' % cols
table_out.close()
def main():
usage = "usage: %prog [options] <motif> <model_file> <test_hdf5_file>"
parser = OptionParser(usage)
parser.add_option("-d", dest="model_hdf5_file", default=None, help="Pre-computed model output as HDF5.")
parser.add_option("-f", dest="filters", default=None, help="Filters to plot length analysis [Default: %default]")
parser.add_option("-o", dest="out_dir", default=".")
parser.add_option(
"-p",
dest="pool",
default=False,
action="store_true",
help="Take representation after pooling [Default: %default]",
)
parser.add_option("-s", dest="sample", default=None, type="int", help="Sequences to sample [Default: %default]")
parser.add_option(
"-t",
dest="targets",
default=None,
help="Comma-separated list of targets to analyze in more depth [Default: %default]",
)
(options, args) = parser.parse_args()
if len(args) != 3:
parser.error("Must provide motif, Basset model file, and test data in HDF5 format.")
else:
motif = args[0]
model_file = args[1]
test_hdf5_file = args[2]
random.seed(2)
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# load data
#################################################################
# load sequences
test_hdf5_in = h5py.File(test_hdf5_file, "r")
seq_vecs = np.array(test_hdf5_in["test_in"])
seq_targets = np.array(test_hdf5_in["test_out"])
seq_headers = np.array(test_hdf5_in["test_headers"])
target_labels = np.array(test_hdf5_in["target_labels"])
test_hdf5_in.close()
#################################################################
# sample
#################################################################
if options.sample is not None and options.sample < seq_vecs.shape[0]:
# choose sampled indexes
sample_i = np.array(random.sample(xrange(seq_vecs.shape[0]), options.sample))
# filter
seq_vecs = seq_vecs[sample_i]
seq_targets = seq_targets[sample_i]
seq_headers = seq_headers[sample_i]
# create a new HDF5 file
sample_hdf5_file = "%s/sample.h5" % options.out_dir
sample_hdf5_out = h5py.File(sample_hdf5_file, "w")
sample_hdf5_out.create_dataset("test_in", data=seq_vecs)
sample_hdf5_out.close()
# update test HDF5
test_hdf5_file = sample_hdf5_file
#################################################################
# write in motif
#################################################################
# this code must match the Torch code
seq_len = seq_vecs.shape[3]
seq_mid = math.floor(seq_len / 2.0 - len(motif) / 2.0) - 1
for si in range(seq_vecs.shape[0]):
for pi in range(len(motif)):
one_hot_set(seq_vecs[si], seq_mid + pi, motif[pi])
# get fasta
seq_dna = vecs2dna(seq_vecs)
#################################################################
# Torch predict
#################################################################
if options.model_hdf5_file is None:
pool_str = ""
if options.pool:
pool_str = "-pool"
options.model_hdf5_file = "%s/model_out.h5" % options.out_dir
torch_cmd = "basset_anchor_predict.lua %s %s %s %s %s" % (
pool_str,
motif,
model_file,
test_hdf5_file,
options.model_hdf5_file,
)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# load model output
model_hdf5_in = h5py.File(options.model_hdf5_file, "r")
pre_preds = np.array(model_hdf5_in["pre_preds"])
preds = np.array(model_hdf5_in["preds"])
scores = np.array(model_hdf5_in["scores"])
seq_filter_outs = np.array(model_hdf5_in["filter_outs"])
pre_seq_filter_outs = np.array(model_hdf5_in["pre_filter_outs"])
model_hdf5_in.close()
# pre-process
seq_filter_means = seq_filter_outs.mean(axis=2)
filter_means = seq_filter_means.mean(axis=0)
filter_msds = seq_filter_means.std(axis=0) + 1e-6
num_seqs = seq_filter_means.shape[0]
num_filters = seq_filter_means.shape[1]
num_targets = len(target_labels)
if options.filters is None:
options.filters = range(num_filters)
else:
options.filters = [int(fi) for fi in options.filters.split(",")]
if options.targets is None:
options.targets = range(num_targets)
else:
options.targets = [int(ti) for ti in options.targets.split(",")]
#################################################################
# scatter plot prediction changes
#################################################################
sns.set(style="ticks", font_scale=1.5)
lim_eps = 0.02
for ti in options.targets:
if num_seqs > 500:
isample = np.array(random.sample(range(num_seqs), 500))
else:
isample = np.array(range(num_seqs))
plt.figure(figsize=(8, 8))
g = sns.jointplot(pre_preds[isample, ti], preds[isample, ti], color="black", stat_func=None, alpha=0.5, space=0)
ax = g.ax_joint
ax.plot([0, 1], [0, 1], c="black", linewidth=1, linestyle="--")
ax.set_xlim((0 - lim_eps, 1 + lim_eps))
ax.set_ylim((0 - lim_eps, 1 + lim_eps))
ax.set_xlabel("Pre-insertion accessibility")
ax.set_ylabel("Post-insertion accessibility")
ax.grid(True, linestyle=":")
ax_x = g.ax_marg_x
ax_x.set_title(target_labels[ti])
plt.savefig("%s/scatter_t%d.pdf" % (options.out_dir, ti))
plt.close()
#################################################################
# plot sequences
#################################################################
for ti in options.targets:
# sort sequences by score
seqsi = np.argsort(scores[:, ti])[::-1]
# print a fasta file with uniformly sampled sequences
unif_i = np.array([int(sp) for sp in np.arange(0, num_seqs, num_seqs / 200.0)])
seqsi_uniform = seqsi[unif_i]
fasta_out = open("%s/seqs_t%d.fa" % (options.out_dir, ti), "w")
for si in seqsi_uniform:
print >> fasta_out, ">%s_gc%.2f_p%.2f\n%s" % (seq_headers[si], gc(seq_dna[si]), preds[si, ti], seq_dna[si])
fasta_out.close()
# print their filter/pos activations to a table
# this is slow and big, and I only need it when I'm trying
# to find a specific example.
table_out = open("%s/seqs_t%d_table.txt" % (options.out_dir, ti), "w")
for si in seqsi_uniform:
for fi in range(num_filters):
for pi in range(seq_filter_outs.shape[2]):
cols = (seq_headers[si], fi, pi, seq_filter_outs[si, fi, pi])
print >> table_out, "%-25s %3d %3d %5.2f" % cols
table_out.close()
# sample fewer for heat map
unif_i = np.array([int(sp) for sp in np.arange(0, num_seqs, num_seqs / 200.0)])
seqsi_uniform = seqsi[unif_i]
""" these kinda suck
# plot heat map
plt.figure()
n = 20
ax_sf = plt.subplot2grid((1,n), (0,0), colspan=n-1)
ax_ss = plt.subplot2grid((1,n), (0,n-1))
# filter heat
sf_norm = seq_filter_means[seqsi_uniform,:] - filter_means
# sf_norm = np.divide(seq_filter_means[seqsi_uniform,:] - filter_means, filter_msds)
sns.heatmap(sf_norm, vmin=-.04, vmax=.04, xticklabels=False, yticklabels=False, ax=ax_sf)
# scores heat
sns.heatmap(scores[seqsi_uniform,ti].reshape(-1,1), xticklabels=False, yticklabels=False, ax=ax_ss)
# this crashed the program, and I don't know why
# plt.tight_layout()
plt.savefig('%s/seqs_t%d.pdf' % (options.out_dir, ti))
plt.close()
"""
#################################################################
# filter mean correlations
#################################################################
# compute and print
table_out = open("%s/table.txt" % options.out_dir, "w")
filter_target_cors = np.zeros((num_filters, num_targets))
for fi in range(num_filters):
for ti in range(num_targets):
cor, p = spearmanr(seq_filter_means[:, fi], scores[:, ti])
cols = (fi, ti, cor, p)
print >> table_out, "%-3d %3d %6.3f %6.1e" % cols
if np.isnan(cor):
cor = 0
filter_target_cors[fi, ti] = cor
table_out.close()
# plot
ftc_df = pd.DataFrame(filter_target_cors, columns=target_labels)
plt.figure()
g = sns.clustermap(ftc_df)
for tick in g.ax_heatmap.get_xticklabels():
tick.set_rotation(-45)
tick.set_horizontalalignment("left")
tick.set_fontsize(3)
for tick in g.ax_heatmap.get_yticklabels():
tick.set_fontsize(3)
plt.savefig("%s/filters_targets.pdf" % options.out_dir)
plt.close()
#################################################################
# filter position correlation
#################################################################
sns.set(style="ticks", font_scale=1.7)
table_out = open("%s/filter_pos.txt" % options.out_dir, "w")
for fi in options.filters:
for ti in options.targets:
print "Plotting f%d versus t%d" % (fi, ti)
# compute correlations
pos_cors = []
pos_cors_pre = []
nans = 0
for pi in range(seq_filter_outs.shape[2]):
# motif correlation
cor, p = spearmanr(seq_filter_outs[:, fi, pi], preds[:, ti])
if np.isnan(cor):
cor = 0
p = 1
nans += 1
pos_cors.append(cor)
# pre correlation
cor_pre, p_pre = spearmanr(pre_seq_filter_outs[:, fi, pi], pre_preds[:, ti])
if np.isnan(cor_pre):
cor_pre = 0
p_pre = 1
pos_cors_pre.append(cor_pre)
cols = (fi, pi, ti, cor, p, cor_pre, p_pre)
print >> table_out, "%-3d %3d %3d %6.3f %6.1e %6.3f %6.1e" % cols
if nans < 50:
# plot
# df_pc = pd.DataFrame({'Position':range(len(pos_cors)), 'Correlation':pos_cors})
plt.figure(figsize=(9, 6))
plt.title(target_labels[ti])
# sns.regplot(x='Position', y='Correlation', data=df_pc, lowess=True)
plt.scatter(
range(len(pos_cors)),
pos_cors_pre,
c=sns_colors[2],
alpha=0.8,
linewidths=0,
label="Before motif insertion",
)
plt.scatter(
range(len(pos_cors)),
pos_cors,
c=sns_colors[1],
alpha=0.8,
linewidths=0,
label="After motif insertion",
)
plt.axhline(y=0, linestyle="--", c="grey", linewidth=1)
ax = plt.gca()
ax.set_xlim(0, len(pos_cors))
ax.set_xlabel("Position")
ax.set_ylabel("Activation vs Prediction Correlation")
ax.grid(True, linestyle=":")
sns.despine()
plt.legend()
plt.tight_layout()
plt.savefig("%s/f%d_t%d.pdf" % (options.out_dir, fi, ti))
plt.close()
table_out.close()
def main():
usage = "usage: %prog [options] <model_file> <input_file>"
parser = OptionParser(usage)
parser.add_option(
"-a", dest="input_activity_file", help="Optional activity table corresponding to an input FASTA file"
)
parser.add_option(
"-d", dest="model_hdf5_file", default=None, help="Pre-computed model output as HDF5 [Default: %default]"
)
parser.add_option(
"-g",
dest="gain_height",
default=False,
action="store_true",
help="Nucleotide heights determined by the max of loss and gain [Default: %default]",
)
parser.add_option(
"-m", dest="min_limit", default=0.1, type="float", help="Minimum heatmap limit [Default: %default]"
)
parser.add_option(
"-n",
dest="center_nt",
default=200,
type="int",
help="Center nt to mutate and plot in the heat map [Default: %default]",
)
parser.add_option("-o", dest="out_dir", default="heat", help="Output directory [Default: %default]")
parser.add_option(
"-s", dest="sample", default=None, type="int", help="Sample sequences from the test set [Default:%default]"
)
parser.add_option(
"-t",
dest="targets",
default="0",
help="Comma-separated list of target indexes to plot (or -1 for all) [Default: %default]",
)
(options, args) = parser.parse_args()
if len(args) != 2:
parser.error("Must provide Basset model file and input sequences (as a FASTA file or test data in an HDF file")
else:
model_file = args[0]
input_file = args[1]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# parse input file
#################################################################
try:
# input_file is FASTA
# load sequences and headers
seqs = []
seq_headers = []
for line in open(input_file):
if line[0] == ">":
seq_headers.append(line[1:].rstrip())
seqs.append("")
else:
seqs[-1] += line.rstrip()
model_input_hdf5 = "%s/model_in.h5" % options.out_dir
if options.input_activity_file:
# one hot code
seqs_1hot, targets = dna_io.load_data_1hot(
input_file, options.input_activity_file, mean_norm=False, whiten=False, permute=False, sort=False
)
# read in target names
target_labels = open(options.input_activity_file).readline().strip().split("\t")
else:
# load sequences
seqs_1hot = dna_io.load_sequences(input_file, permute=False)
targets = None
target_labels = None
# sample
if options.sample:
sample_i = np.array(random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
if targets is not None:
targets = targets[sample_i]
# reshape sequences for torch
seqs_1hot = seqs_1hot.reshape((seqs_1hot.shape[0], 4, 1, seqs_1hot.shape[1] / 4))
# write as test data to a HDF5 file
h5f = h5py.File(model_input_hdf5, "w")
h5f.create_dataset("test_in", data=seqs_1hot)
h5f.close()
except (IOError, IndexError):
# input_file is HDF5
try:
model_input_hdf5 = input_file
# load (sampled) test data from HDF5
hdf5_in = h5py.File(input_file, "r")
seqs_1hot = np.array(hdf5_in["test_in"])
targets = np.array(hdf5_in["test_out"])
try: # TEMP
seq_headers = np.array(hdf5_in["test_headers"])
target_labels = np.array(hdf5_in["target_labels"])
except:
seq_headers = None
target_labels = None
hdf5_in.close()
# sample
if options.sample:
sample_i = np.array(random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
targets = targets[sample_i]
# write sampled data to a new HDF5 file
model_input_hdf5 = "%s/model_in.h5" % options.out_dir
h5f = h5py.File(model_input_hdf5, "w")
h5f.create_dataset("test_in", data=seqs_1hot)
h5f.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
except IOError:
parser.error("Could not parse input file as FASTA or HDF5.")
#################################################################
# Torch predict modifications
#################################################################
if options.model_hdf5_file is None:
options.model_hdf5_file = "%s/model_out.h5" % options.out_dir
torch_cmd = "basset_sat_predict.lua -center_nt %d %s %s %s" % (
options.center_nt,
model_file,
model_input_hdf5,
options.model_hdf5_file,
)
if subprocess.call(torch_cmd, shell=True):
message("Error running basset_sat_predict.lua", "error")
#################################################################
# load modification predictions
#################################################################
hdf5_in = h5py.File(options.model_hdf5_file, "r")
seq_mod_preds = np.array(hdf5_in["seq_mod_preds"])
hdf5_in.close()
# trim seqs to match seq_mod_preds length
seq_len = len(seqs[0])
delta_start = 0
delta_len = seq_mod_preds.shape[2]
if delta_len < seq_len:
delta_start = (seq_len - delta_len) / 2
for i in range(len(seqs)):
seqs[i] = seqs[i][delta_start : delta_start + delta_len]
# decide which cells to plot
if options.targets == "-1":
plot_targets = xrange(seq_mod_preds.shape[3])
else:
plot_targets = [int(ci) for ci in options.targets.split(",")]
#################################################################
# plot
#################################################################
table_out = open("%s/table.txt" % options.out_dir, "w")
rdbu = sns.color_palette("RdBu_r", 10)
nts = "ACGT"
for si in range(seq_mod_preds.shape[0]):
try:
header = seq_headers[si]
except TypeError:
header = "seq%d" % si
seq = seqs[si]
# plot some descriptive heatmaps for each individual cell type
for ci in plot_targets:
seq_mod_preds_cell = seq_mod_preds[si, :, :, ci]
real_pred_cell = get_real_pred(seq_mod_preds_cell, seq)
# compute matrices
norm_matrix = seq_mod_preds_cell - real_pred_cell
min_scores = seq_mod_preds_cell.min(axis=0)
max_scores = seq_mod_preds_cell.max(axis=0)
minmax_matrix = np.vstack([min_scores - real_pred_cell, max_scores - real_pred_cell])
# prepare figure
sns.set(style="white", font_scale=0.5)
sns.axes_style({"axes.linewidth": 1})
heat_cols = 400
sad_start = 1
sad_end = 323
logo_start = 0
logo_end = 324
fig = plt.figure(figsize=(20, 3))
ax_logo = plt.subplot2grid((3, heat_cols), (0, logo_start), colspan=(logo_end - logo_start))
ax_sad = plt.subplot2grid((3, heat_cols), (1, sad_start), colspan=(sad_end - sad_start))
ax_heat = plt.subplot2grid((3, heat_cols), (2, 0), colspan=heat_cols)
# print a WebLogo of the sequence
vlim = max(options.min_limit, abs(minmax_matrix).max())
if options.gain_height:
seq_heights = 0.25 + 1.75 / vlim * (abs(minmax_matrix).max(axis=0))
else:
seq_heights = 0.25 + 1.75 / vlim * (-minmax_matrix[0])
logo_eps = "%s/%s_c%d_seq.eps" % (options.out_dir, header_filename(header), ci)
seq_logo(seq, seq_heights, logo_eps)
# add to figure
logo_png = "%s.png" % logo_eps[:-4]
logo_cmd = "convert -density 300 %s %s" % (logo_eps, logo_png)
if subprocess.call(logo_cmd, shell=True):
message("Error running convert", "error")
logo = Image.open(logo_png)
ax_logo.imshow(logo)
ax_logo.set_axis_off()
# plot loss and gain SAD scores
ax_sad.plot(-minmax_matrix[0], c=rdbu[0], label="loss", linewidth=1)
ax_sad.plot(minmax_matrix[1], c=rdbu[-1], label="gain", linewidth=1)
ax_sad.set_xlim(0, minmax_matrix.shape[1])
ax_sad.legend()
# ax_sad.grid(True, linestyle=':')
for axis in ["top", "bottom", "left", "right"]:
ax_sad.spines[axis].set_linewidth(0.5)
# plot real-normalized scores
vlim = max(options.min_limit, abs(norm_matrix).max())
sns.heatmap(norm_matrix, linewidths=0, cmap="RdBu_r", vmin=-vlim, vmax=vlim, xticklabels=False, ax=ax_heat)
ax_heat.yaxis.set_ticklabels("TGCA", rotation="horizontal") # , size=10)
# save final figure
plt.tight_layout()
plt.savefig("%s/%s_c%d_heat.pdf" % (options.out_dir, header.replace(":", "_"), ci), dpi=300)
plt.close()
#################################################################
# print table of nt variability for each cell
#################################################################
for ci in range(seq_mod_preds.shape[3]):
seq_mod_preds_cell = seq_mod_preds[si, :, :, ci]
real_pred_cell = get_real_pred(seq_mod_preds_cell, seq)
min_scores = seq_mod_preds_cell.min(axis=0)
max_scores = seq_mod_preds_cell.max(axis=0)
loss_matrix = real_pred_cell - seq_mod_preds_cell.min(axis=0)
gain_matrix = seq_mod_preds_cell.max(axis=0) - real_pred_cell
for pos in range(seq_mod_preds_cell.shape[1]):
cols = [header, delta_start + pos, ci, loss_matrix[pos], gain_matrix[pos]]
print >> table_out, "\t".join([str(c) for c in cols])
table_out.close()
def parse_interaction_scores_hdf5(scores_hdf5_file):
### single motif scores = [activation for each filter][base_seq]
### paired motif scores = activation for [filter1][filter2][base_seq]
### motif_seqs = motif that is used to represent each filter
def get_base_seqs(seqs):
return seqs[:NUM_BASE_SEQS]
def get_motifs(seqs):
motif_seqs = []
z = NUM_BASE_SEQS
for i in range(NUM_MOTIFS):
motif_seqs.append(seqs[z][300:319])
for j in range(NUM_BASE_SEQS):
z += 1
return motif_seqs
def get_base_scores(preds):
base_scores = []
for i in range(NUM_BASE_SEQS):
base_scores.append(preds[i])
return base_scores
def get_single_motif_scores(preds):
single_motif_scores = []
z = NUM_BASE_SEQS
for i in range(NUM_MOTIFS):
single_motif_scores.append([False] * NUM_BASE_SEQS)
for j in range(NUM_BASE_SEQS):
single_motif_scores[i][j] = preds[z]
z += 1
return single_motif_scores
def get_single_motif_scores_offset(preds):
z = NUM_BASE_SEQS + NUM_BASE_SEQS * NUM_MOTIFS
single_motif_scores = []
for i in range(NUM_MOTIFS):
single_motif_scores.append([False] * NUM_BASE_SEQS)
for j in range(NUM_BASE_SEQS):
single_motif_scores.append(preds[z])
z += 1
return single_motif_scores
def get_paired_motif_scores(preds):
paired_motif_scores = []
for i in range(NUM_MOTIFS):
paired_motif_scores.append([])
for j in range(NUM_MOTIFS):
paired_motif_scores[i].append([False] * NUM_BASE_SEQS)
z = NUM_BASE_SEQS + 2 * NUM_BASE_SEQS * NUM_MOTIFS
for i in range(NUM_MOTIFS):
for j in range(NUM_MOTIFS):
for k in range(NUM_BASE_SEQS):
paired_motif_scores[i][j][k] = preds[z]
z += 1
return paired_motif_scores
### Read in file
scores_hdf5_in = h5py.File(scores_hdf5_file, "r")
preds = np.array(scores_hdf5_in["preds"])
seq_vecs = scores_hdf5_in["seqs"]
seqs = dna_io.vecs2dna(seq_vecs)
scores_hdf5_in.close()
### Make sure global variables are set properly
assert NUM_BASE_SEQS + 2 * NUM_BASE_SEQS * NUM_MOTIFS + NUM_BASE_SEQS * NUM_MOTIFS * NUM_MOTIFS == len(preds)
base_seqs = get_base_seqs(seqs)
base_scores = get_base_scores(preds)
single_motif_scores = get_single_motif_scores(preds)
single_motif_scores_offset = get_single_motif_scores(preds)
paired_motif_scores = get_paired_motif_scores(preds)
motif_seqs = get_motifs(seqs)
return (base_seqs, base_scores, single_motif_scores, single_motif_scores_offset, paired_motif_scores, motif_seqs)
def main():
usage = 'usage: %prog [options] <model_file> <input_file>'
parser = OptionParser(usage)
parser.add_option(
'-a',
dest='input_activity_file',
help='Optional activity table corresponding to an input FASTA file')
parser.add_option(
'-d',
dest='model_hdf5_file',
default=None,
help='Pre-computed model output as HDF5 [Default: %default]')
parser.add_option('-o',
dest='out_dir',
default='heat',
help='Output directory [Default: %default]')
parser.add_option('-r',
dest='rng_seed',
default=1,
type='float',
help='Random number generator seed [Default: %default]')
parser.add_option(
'-s',
dest='sample',
default=None,
type='int',
help='Sample sequences from the test set [Default:%default]')
parser.add_option(
'-t',
dest='targets',
default='0',
help=
'Comma-separated list of target indexes to plot (or -1 for all) [Default: %default]'
)
(options, args) = parser.parse_args()
if len(args) != 2:
parser.error(
'Must provide Basset model file and input sequences (as a FASTA file or test data in an HDF file'
)
else:
model_file = args[0]
input_file = args[1]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
random.seed(options.rng_seed)
#################################################################
# parse input file
#################################################################
try:
# input_file is FASTA
# load sequences and headers
seqs = []
seq_headers = []
for line in open(input_file):
if line[0] == '>':
seq_headers.append(line[1:].rstrip())
seqs.append('')
else:
seqs[-1] += line.rstrip()
model_input_hdf5 = '%s/model_in.h5' % options.out_dir
if options.input_activity_file:
# one hot code
seqs_1hot, targets = dna_io.load_data_1hot(
input_file,
options.input_activity_file,
mean_norm=False,
whiten=False,
permute=False,
sort=False)
# read in target names
target_labels = open(
options.input_activity_file).readline().strip().split('\t')
else:
# load sequences
seqs_1hot = dna_io.load_sequences(input_file, permute=False)
targets = None
target_labels = None
# sample
if options.sample:
sample_i = np.array(
random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
if targets is not None:
targets = targets[sample_i]
# reshape sequences for torch
seqs_1hot = seqs_1hot.reshape(
(seqs_1hot.shape[0], 4, 1, seqs_1hot.shape[1] / 4))
# write as test data to a HDF5 file
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
except (IOError, IndexError):
# input_file is HDF5
try:
model_input_hdf5 = input_file
# load (sampled) test data from HDF5
hdf5_in = h5py.File(input_file, 'r')
seqs_1hot = np.array(hdf5_in['test_in'])
targets = np.array(hdf5_in['test_out'])
try: # TEMP
seq_headers = np.array(hdf5_in['test_headers'])
target_labels = np.array(hdf5_in['target_labels'])
except:
seq_headers = None
target_labels = None
hdf5_in.close()
# sample
if options.sample:
sample_i = np.array(
random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
targets = targets[sample_i]
# write sampled data to a new HDF5 file
model_input_hdf5 = '%s/model_in.h5' % options.out_dir
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
except IOError:
parser.error('Could not parse input file as FASTA or HDF5.')
#################################################################
# Torch predict modifications
#################################################################
if options.model_hdf5_file is None:
options.model_hdf5_file = '%s/model_out.h5' % options.out_dir
torch_cmd = 'basset_net_predict.lua %s %s %s' % (
model_file, model_input_hdf5, options.model_hdf5_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
#################################################################
# load modification predictions
#################################################################
hdf5_in = h5py.File(options.model_hdf5_file, 'r')
reprs = []
l = 1
while 'reprs%d' % l in hdf5_in.keys():
reprs.append(np.array(hdf5_in['reprs%d' % l]))
l += 1
hdf5_in.close()
#################################################################
# plot
#################################################################
print len(reprs)
for l in range(len(reprs)):
for si in range(len(seq_headers)):
plt.figure()
# just write the sequence out above it
# or maybe I'll ultimately want to write an
# influence version. yea probably.
print reprs[l][si].shape
sns.heatmap(reprs[l][si], linewidths=0, xticklabels=False)
plt.savefig('%s/%s_l%d.pdf' %
(options.out_dir, header_filename(seq_headers[si]), l))
plt.close()
def main():
usage = 'usage: %prog [options] <model_file> <input_file>'
parser = OptionParser(usage)
parser.add_option('-a', dest='input_activity_file', help='Optional activity table corresponding to an input FASTA file')
parser.add_option('-d', dest='model_hdf5_file', default=None, help='Pre-computed model output as HDF5 [Default: %default]')
parser.add_option('-o', dest='out_dir', default='heat', help='Output directory [Default: %default]')
parser.add_option('-r', dest='rng_seed', default=1, type='float', help='Random number generator seed [Default: %default]')
parser.add_option('-s', dest='sample', default=None, type='int', help='Sample sequences from the test set [Default:%default]')
parser.add_option('-t', dest='targets', default='0', help='Comma-separated list of target indexes to plot (or -1 for all) [Default: %default]')
(options,args) = parser.parse_args()
if len(args) != 2:
parser.error('Must provide Basset model file and input sequences (as a FASTA file or test data in an HDF file')
else:
model_file = args[0]
input_file = args[1]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
random.seed(options.rng_seed)
#################################################################
# parse input file
#################################################################
try:
# input_file is FASTA
# load sequences and headers
seqs = []
seq_headers = []
for line in open(input_file):
if line[0] == '>':
seq_headers.append(line[1:].rstrip())
seqs.append('')
else:
seqs[-1] += line.rstrip()
model_input_hdf5 = '%s/model_in.h5'%options.out_dir
if options.input_activity_file:
# one hot code
seqs_1hot, targets = dna_io.load_data_1hot(input_file, options.input_activity_file, mean_norm=False, whiten=False, permute=False, sort=False)
# read in target names
target_labels = open(options.input_activity_file).readline().strip().split('\t')
else:
# load sequences
seqs_1hot = dna_io.load_sequences(input_file, permute=False)
targets = None
target_labels = None
# sample
if options.sample:
sample_i = np.array(random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
if targets is not None:
targets = targets[sample_i]
# reshape sequences for torch
seqs_1hot = seqs_1hot.reshape((seqs_1hot.shape[0],4,1,seqs_1hot.shape[1]/4))
# write as test data to a HDF5 file
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
except (IOError, IndexError):
# input_file is HDF5
try:
model_input_hdf5 = input_file
# load (sampled) test data from HDF5
hdf5_in = h5py.File(input_file, 'r')
seqs_1hot = np.array(hdf5_in['test_in'])
targets = np.array(hdf5_in['test_out'])
try: # TEMP
seq_headers = np.array(hdf5_in['test_headers'])
target_labels = np.array(hdf5_in['target_labels'])
except:
seq_headers = None
target_labels = None
hdf5_in.close()
# sample
if options.sample:
sample_i = np.array(random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
targets = targets[sample_i]
# write sampled data to a new HDF5 file
model_input_hdf5 = '%s/model_in.h5'%options.out_dir
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
except IOError:
parser.error('Could not parse input file as FASTA or HDF5.')
#################################################################
# Torch predict modifications
#################################################################
if options.model_hdf5_file is None:
options.model_hdf5_file = '%s/model_out.h5' % options.out_dir
torch_cmd = 'basset_net_predict.lua %s %s %s' % (model_file, model_input_hdf5, options.model_hdf5_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
#################################################################
# load modification predictions
#################################################################
hdf5_in = h5py.File(options.model_hdf5_file, 'r')
reprs = []
l = 1
while 'reprs%d'%l in hdf5_in.keys():
reprs.append(np.array(hdf5_in['reprs%d'%l]))
l += 1
hdf5_in.close()
#################################################################
# plot
#################################################################
print len(reprs)
for l in range(len(reprs)):
for si in range(len(seq_headers)):
plt.figure()
# just write the sequence out above it
# or maybe I'll ultimately want to write an
# influence version. yea probably.
print reprs[l][si].shape
sns.heatmap(reprs[l][si], linewidths=0, xticklabels=False)
plt.savefig('%s/%s_l%d.pdf' % (options.out_dir, header_filename(seq_headers[si]), l))
plt.close()
def main():
usage = 'usage: %prog [options] <motif> <model_file> <test_hdf5_file>'
parser = OptionParser(usage)
parser.add_option('-d',
dest='model_hdf5_file',
default=None,
help='Pre-computed model output as HDF5.')
parser.add_option(
'-f',
dest='filters',
default=None,
help='Filters to plot length analysis [Default: %default]')
parser.add_option('-o', dest='out_dir', default='.')
parser.add_option(
'-p',
dest='pool',
default=False,
action='store_true',
help='Take representation after pooling [Default: %default]')
parser.add_option('-s',
dest='sample',
default=None,
type='int',
help='Sequences to sample [Default: %default]')
parser.add_option(
'-t',
dest='targets',
default=None,
help=
'Comma-separated list of targets to analyze in more depth [Default: %default]'
)
(options, args) = parser.parse_args()
if len(args) != 3:
parser.error(
'Must provide motif, Basset model file, and test data in HDF5 format.'
)
else:
motif = args[0]
model_file = args[1]
test_hdf5_file = args[2]
random.seed(2)
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# load data
#################################################################
# load sequences
test_hdf5_in = h5py.File(test_hdf5_file, 'r')
seq_vecs = np.array(test_hdf5_in['test_in'])
seq_targets = np.array(test_hdf5_in['test_out'])
seq_headers = np.array(test_hdf5_in['test_headers'])
target_labels = np.array(test_hdf5_in['target_labels'])
test_hdf5_in.close()
#################################################################
# sample
#################################################################
if options.sample is not None and options.sample < seq_vecs.shape[0]:
# choose sampled indexes
sample_i = np.array(
random.sample(xrange(seq_vecs.shape[0]), options.sample))
# filter
seq_vecs = seq_vecs[sample_i]
seq_targets = seq_targets[sample_i]
seq_headers = seq_headers[sample_i]
# create a new HDF5 file
sample_hdf5_file = '%s/sample.h5' % options.out_dir
sample_hdf5_out = h5py.File(sample_hdf5_file, 'w')
sample_hdf5_out.create_dataset('test_in', data=seq_vecs)
sample_hdf5_out.close()
# update test HDF5
test_hdf5_file = sample_hdf5_file
#################################################################
# write in motif
#################################################################
# this code must match the Torch code
seq_len = seq_vecs.shape[3]
seq_mid = math.floor(seq_len / 2.0 - len(motif) / 2.0) - 1
for si in range(seq_vecs.shape[0]):
for pi in range(len(motif)):
one_hot_set(seq_vecs[si], seq_mid + pi, motif[pi])
# get fasta
seq_dna = vecs2dna(seq_vecs)
#################################################################
# Torch predict
#################################################################
if options.model_hdf5_file is None:
pool_str = ''
if options.pool:
pool_str = '-pool'
options.model_hdf5_file = '%s/model_out.h5' % options.out_dir
torch_cmd = 'basset_anchor_predict.lua %s %s %s %s %s' % (
pool_str, motif, model_file, test_hdf5_file,
options.model_hdf5_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# load model output
model_hdf5_in = h5py.File(options.model_hdf5_file, 'r')
pre_preds = np.array(model_hdf5_in['pre_preds'])
preds = np.array(model_hdf5_in['preds'])
scores = np.array(model_hdf5_in['scores'])
seq_filter_outs = np.array(model_hdf5_in['filter_outs'])
pre_seq_filter_outs = np.array(model_hdf5_in['pre_filter_outs'])
model_hdf5_in.close()
# pre-process
seq_filter_means = seq_filter_outs.mean(axis=2)
filter_means = seq_filter_means.mean(axis=0)
filter_msds = seq_filter_means.std(axis=0) + 1e-6
num_seqs = seq_filter_means.shape[0]
num_filters = seq_filter_means.shape[1]
num_targets = len(target_labels)
if options.filters is None:
options.filters = range(num_filters)
else:
options.filters = [int(fi) for fi in options.filters.split(',')]
if options.targets is None:
options.targets = range(num_targets)
else:
options.targets = [int(ti) for ti in options.targets.split(',')]
#################################################################
# scatter plot prediction changes
#################################################################
sns.set(style='ticks', font_scale=1.5)
lim_eps = 0.02
for ti in options.targets:
if num_seqs > 500:
isample = np.array(random.sample(range(num_seqs), 500))
else:
isample = np.array(range(num_seqs))
plt.figure(figsize=(8, 8))
g = sns.jointplot(pre_preds[isample, ti],
preds[isample, ti],
color='black',
stat_func=None,
alpha=0.5,
space=0)
ax = g.ax_joint
ax.plot([0, 1], [0, 1], c='black', linewidth=1, linestyle='--')
ax.set_xlim((0 - lim_eps, 1 + lim_eps))
ax.set_ylim((0 - lim_eps, 1 + lim_eps))
ax.set_xlabel('Pre-insertion accessibility')
ax.set_ylabel('Post-insertion accessibility')
ax.grid(True, linestyle=':')
ax_x = g.ax_marg_x
ax_x.set_title(target_labels[ti])
plt.savefig('%s/scatter_t%d.pdf' % (options.out_dir, ti))
plt.close()
#################################################################
# plot sequences
#################################################################
for ti in options.targets:
# sort sequences by score
seqsi = np.argsort(scores[:, ti])[::-1]
# print a fasta file with uniformly sampled sequences
unif_i = np.array(
[int(sp) for sp in np.arange(0, num_seqs, num_seqs / 200.0)])
seqsi_uniform = seqsi[unif_i]
fasta_out = open('%s/seqs_t%d.fa' % (options.out_dir, ti), 'w')
for si in seqsi_uniform:
print >> fasta_out, '>%s_gc%.2f_p%.2f\n%s' % (
seq_headers[si], gc(seq_dna[si]), preds[si, ti], seq_dna[si])
fasta_out.close()
# print their filter/pos activations to a table
# this is slow and big, and I only need it when I'm trying
# to find a specific example.
table_out = open('%s/seqs_t%d_table.txt' % (options.out_dir, ti), 'w')
for si in seqsi_uniform:
for fi in range(num_filters):
for pi in range(seq_filter_outs.shape[2]):
cols = (seq_headers[si], fi, pi, seq_filter_outs[si, fi,
pi])
print >> table_out, '%-25s %3d %3d %5.2f' % cols
table_out.close()
# sample fewer for heat map
unif_i = np.array(
[int(sp) for sp in np.arange(0, num_seqs, num_seqs / 200.0)])
seqsi_uniform = seqsi[unif_i]
''' these kinda suck
# plot heat map
plt.figure()
n = 20
ax_sf = plt.subplot2grid((1,n), (0,0), colspan=n-1)
ax_ss = plt.subplot2grid((1,n), (0,n-1))
# filter heat
sf_norm = seq_filter_means[seqsi_uniform,:] - filter_means
# sf_norm = np.divide(seq_filter_means[seqsi_uniform,:] - filter_means, filter_msds)
sns.heatmap(sf_norm, vmin=-.04, vmax=.04, xticklabels=False, yticklabels=False, ax=ax_sf)
# scores heat
sns.heatmap(scores[seqsi_uniform,ti].reshape(-1,1), xticklabels=False, yticklabels=False, ax=ax_ss)
# this crashed the program, and I don't know why
# plt.tight_layout()
plt.savefig('%s/seqs_t%d.pdf' % (options.out_dir, ti))
plt.close()
'''
#################################################################
# filter mean correlations
#################################################################
# compute and print
table_out = open('%s/table.txt' % options.out_dir, 'w')
filter_target_cors = np.zeros((num_filters, num_targets))
for fi in range(num_filters):
for ti in range(num_targets):
cor, p = spearmanr(seq_filter_means[:, fi], scores[:, ti])
cols = (fi, ti, cor, p)
print >> table_out, '%-3d %3d %6.3f %6.1e' % cols
if np.isnan(cor):
cor = 0
filter_target_cors[fi, ti] = cor
table_out.close()
# plot
ftc_df = pd.DataFrame(filter_target_cors, columns=target_labels)
plt.figure()
g = sns.clustermap(ftc_df)
for tick in g.ax_heatmap.get_xticklabels():
tick.set_rotation(-45)
tick.set_horizontalalignment('left')
tick.set_fontsize(3)
for tick in g.ax_heatmap.get_yticklabels():
tick.set_fontsize(3)
plt.savefig('%s/filters_targets.pdf' % options.out_dir)
plt.close()
#################################################################
# filter position correlation
#################################################################
sns.set(style='ticks', font_scale=1.7)
table_out = open('%s/filter_pos.txt' % options.out_dir, 'w')
for fi in options.filters:
for ti in options.targets:
print 'Plotting f%d versus t%d' % (fi, ti)
# compute correlations
pos_cors = []
pos_cors_pre = []
nans = 0
for pi in range(seq_filter_outs.shape[2]):
# motif correlation
cor, p = spearmanr(seq_filter_outs[:, fi, pi], preds[:, ti])
if np.isnan(cor):
cor = 0
p = 1
nans += 1
pos_cors.append(cor)
# pre correlation
cor_pre, p_pre = spearmanr(pre_seq_filter_outs[:, fi, pi],
pre_preds[:, ti])
if np.isnan(cor_pre):
cor_pre = 0
p_pre = 1
pos_cors_pre.append(cor_pre)
cols = (fi, pi, ti, cor, p, cor_pre, p_pre)
print >> table_out, '%-3d %3d %3d %6.3f %6.1e %6.3f %6.1e' % cols
if nans < 50:
# plot
# df_pc = pd.DataFrame({'Position':range(len(pos_cors)), 'Correlation':pos_cors})
plt.figure(figsize=(9, 6))
plt.title(target_labels[ti])
# sns.regplot(x='Position', y='Correlation', data=df_pc, lowess=True)
plt.scatter(range(len(pos_cors)),
pos_cors_pre,
c=sns_colors[2],
alpha=0.8,
linewidths=0,
label='Before motif insertion')
plt.scatter(range(len(pos_cors)),
pos_cors,
c=sns_colors[1],
alpha=0.8,
linewidths=0,
label='After motif insertion')
plt.axhline(y=0, linestyle='--', c='grey', linewidth=1)
ax = plt.gca()
ax.set_xlim(0, len(pos_cors))
ax.set_xlabel('Position')
ax.set_ylabel('Activation vs Prediction Correlation')
ax.grid(True, linestyle=':')
sns.despine()
plt.legend()
plt.tight_layout()
plt.savefig('%s/f%d_t%d.pdf' % (options.out_dir, fi, ti))
plt.close()
table_out.close()
def main():
usage = 'usage: %prog [options] <model_file>'
parser = OptionParser(usage)
parser.add_option('-a', dest='targets_file', default=None, help='File labelings targets in the second column [Default: %default]')
parser.add_option('-c', dest='center_nt', default=50, help='Center nt to consider kmers from [Default: %default]')
parser.add_option('-d', dest='model_out_file', default=None, help='Pre-computed model output table.')
parser.add_option('-k', dest='kmer', default=8, type='int', help='K-mer length [Default: %default]')
parser.add_option('-l', dest='seq_len', default=1000, type='int', help='Input sequence length [Default: %default]')
parser.add_option('-n', dest='num_seqs', default=100000, type='int', help='Number of sequences to predict [Default: %default]')
parser.add_option('-o', dest='out_dir', default='.')
parser.add_option('-r', dest='rc', default=False, action='store_true', help='Consider k-mers w/ their reverse complements [Default: %default]')
parser.add_option('-t', dest='targets', default=None, help='Comma-separated list of targets to analyze in more depth [Default: %default]')
parser.add_option('--top', dest='top_num', default=100, type='int', help='Number of sequences with which to make a multiple sequence alignment')
(options,args) = parser.parse_args()
if len(args) != 1:
parser.error('Must provide Basset model file.')
else:
model_file = args[0]
random.seed(2)
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
if options.model_out_file is not None:
seq_dna = []
for line in open('%s/seqs.fa' % options.out_dir):
if line[0] == '>':
seq_dna.append('')
else:
seq_dna[-1] += line.rstrip()
else:
#################################################################
# generate random sequences
#################################################################
# random sequences
seq_vecs = np.zeros((options.num_seqs,4,1,options.seq_len), dtype='float16')
for si in range(options.num_seqs):
for li in range(options.seq_len):
ni = random.randint(0,3)
seq_vecs[si,ni,0,li] = 1
# create a new HDF5 file
seq_hdf5_file = '%s/seqs.h5' % options.out_dir
seq_hdf5_out = h5py.File(seq_hdf5_file, 'w')
seq_hdf5_out.create_dataset('test_in', data=seq_vecs)
seq_hdf5_out.close()
# get fasta
seq_dna = vecs2dna(seq_vecs)
# print to file
fasta_out = open('%s/seqs.fa' % options.out_dir, 'w')
for i in range(len(seq_dna)):
print >> fasta_out, '>%d\n%s' % (i,seq_dna[i])
fasta_out.close()
#################################################################
# Torch predict
#################################################################
options.model_out_file = '%s/model_out.txt' % options.out_dir
torch_cmd = 'basset_predict.lua -scores %s %s %s' % (model_file, seq_hdf5_file, options.model_out_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# clean up sequence HDF5
os.remove(seq_hdf5_file)
# load scores
seq_scores = np.loadtxt(options.model_out_file, dtype='float32')
# read target labels
if options.targets_file:
target_labels = [line.split()[1] for line in open(options.targets_file)]
else:
target_labels = ['t%d'%(ti+1) for ti in range(seq_scores.shape[1])]
if options.targets is None:
options.targets = range(seq_scores.shape[1])
else:
options.targets = [int(ti) for ti in options.targets.split(',')]
#################################################################
# process and output
#################################################################
kmers_start = (options.seq_len - options.center_nt) / 2
for ti in options.targets:
print 'Working on target %d' % ti
##############################################
# hash scores by k-mer
##############################################
kmer_scores_raw = {}
for si in range(len(seq_dna)):
# get score
sscore = seq_scores[si,ti]
# hash to each center kmer
for ki in range(kmers_start, kmers_start + options.center_nt):
kmer = seq_dna[si][ki:ki+options.kmer]
if options.rc:
kmer = consider_rc(kmer)
kmer_scores_raw.setdefault(kmer,[]).append(sscore)
##############################################
# compute means and print table
##############################################
table_out = open('%s/table%d.txt' % (options.out_dir,ti), 'w')
kmer_means_raw = {}
for kmer in kmer_scores_raw:
kmer_means_raw[kmer] = np.mean(kmer_scores_raw[kmer])
kmer_n = len(kmer_scores_raw[kmer])
cols = (kmer, kmer_n, kmer_means_raw[kmer], np.std(kmer_scores_raw[kmer])/math.sqrt(kmer_n))
print >> table_out, '%s %4d %6.3f %6.3f' % cols
table_out.close()
##############################################
# plot density
##############################################
plt.figure()
sns.distplot(kmer_means_raw.values(), kde=False)
plt.savefig('%s/density%d.pdf' % (options.out_dir,ti))
plt.close()
##############################################
# top k-mers distance matrix
##############################################
kmer_means = {}
kmer_means_mean = np.mean(kmer_means_raw.values())
for kmer in kmer_means_raw:
kmer_means[kmer] = kmer_means_raw[kmer] - kmer_means_mean
# score by score
scores_kmers = [(kmer_means[kmer],kmer) for kmer in kmer_means]
scores_kmers.sort(reverse=True)
# take top k-mers
top_kmers = []
top_kmers_scores = []
for score, kmer in scores_kmers[:options.top_num]:
top_kmers.append(kmer)
top_kmers_scores.append(score)
top_kmers = np.array(top_kmers)
top_kmers_scores = np.array(top_kmers_scores)
# compute distance matrix
top_kmers_dists = np.zeros((options.top_num, options.top_num))
for i in range(options.top_num):
for j in range(i+1,options.top_num):
if options.rc:
top_kmers_dists[i,j] = kmer_distance_rc(top_kmers[i], top_kmers[j])
else:
top_kmers_dists[i,j] = kmer_distance(top_kmers[i], top_kmers[j])
top_kmers_dists[j,i] = top_kmers_dists[i,j]
# clip the distances
np.clip(top_kmers_dists, 0, 3, out=top_kmers_dists)
# plot
plot_kmer_dists(top_kmers_dists, top_kmers_scores, top_kmers, '%s/top_kmers_heat%d.pdf'%(options.out_dir,ti))
# cluster and plot
cluster_kmer_dists(top_kmers_dists, top_kmers_scores, top_kmers, '%s/top_kmers_clust%d.pdf'%(options.out_dir,ti))
def main():
usage = "usage: %prog [options] <model_file> <profile_file> <input_file>"
parser = OptionParser(usage)
parser.add_option(
"-a", dest="input_activity_file", help="Optional activity table corresponding to an input FASTA file"
)
parser.add_option(
"--all",
dest="all_data",
default=False,
action="store_true",
help="Search all training/valid/test sequences. By default we search only the test set. [Default: %default]",
)
parser.add_option(
"--cuda", dest="cuda", default=False, action="store_true", help="Run on GPGPU [Default: %default]"
)
parser.add_option(
"--cudnn", dest="cudnn", default=False, action="store_true", help="Run on GPGPU w/cuDNN [Default: %default]"
)
parser.add_option(
"-d",
dest="model_out_file",
default=None,
help="Pre-computed model predictions output table [Default: %default]",
)
parser.add_option(
"-e",
dest="norm_even",
default=False,
action="store_true",
help="Normalize the weights for the positive and negative datasets to be even [Default: %default]",
)
parser.add_option("-f", dest="font_heat", default=6, type="int", help="Heat map axis font size [Default: %default]")
parser.add_option(
"-n", dest="num_dissect", default=10, type="int", help="Dissect the top n hits [Default: %default]"
)
parser.add_option("-o", dest="out_dir", default="profile", help="Output directory [Default: %default]")
parser.add_option(
"-r",
dest="norm_preds",
default=False,
action="store_true",
help="Normalize predictions to have equal frequency [Default: %default]",
)
parser.add_option(
"-z",
dest="weight_zero",
default=1.0,
type="float",
help="Adjust the weights for the zero samples by this value [Default: %default]",
)
(options, args) = parser.parse_args()
if len(args) != 3:
parser.error(
"Must provide Basset model file, activity profile file, and input sequences (as a FASTA file or test data in an HDF file)"
)
else:
model_file = args[0]
profile_file = args[1]
input_file = args[2]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# parse input file
#################################################################
try:
# input_file is FASTA
# load sequences and headers
seqs = []
seq_headers = []
for line in open(input_file):
if line[0] == ">":
seq_headers.append(line[1:].rstrip())
seqs.append("")
else:
seqs[-1] += line.rstrip()
# convert to arrays
seqs = np.array(seqs)
seq_headers = np.array(seq_headers)
model_input_hdf5 = "%s/model_in.h5" % options.out_dir
if options.input_activity_file:
# one hot code
seqs_1hot, targets = dna_io.load_data_1hot(
input_file, options.input_activity_file, mean_norm=False, whiten=False, permute=False, sort=False
)
else:
# load sequences
seqs_1hot = dna_io.load_sequences(input_file, permute=False)
targets = None
# reshape sequences for torch
seqs_1hot = seqs_1hot.reshape((seqs_1hot.shape[0], 4, 1, seqs_1hot.shape[1] / 4))
# write as test data to a HDF5 file
h5f = h5py.File(model_input_hdf5, "w")
h5f.create_dataset("test_in", data=seqs_1hot)
h5f.close()
except (IOError, IndexError, UnicodeDecodeError):
# input_file is HDF5
try:
model_input_hdf5 = input_file
# load (sampled) test data from HDF5
hdf5_in = h5py.File(input_file, "r")
seqs_1hot = np.array(hdf5_in["test_in"])
targets = np.array(hdf5_in["test_out"])
seq_headers = np.array([h.decode("UTF-8") for h in hdf5_in["test_headers"]])
hdf5_in.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
except IOError:
parser.error("Could not parse input file as FASTA or HDF5.")
#################################################################
# Torch predict modifications
#################################################################
# GPU options (needed below, too)
gpgpu_str = ""
if options.cudnn:
gpgpu_str = "-cudnn"
elif options.cuda:
gpgpu_str = "-cuda"
if options.model_out_file is None:
options.model_out_file = "%s/preds.txt" % options.out_dir
torch_cmd = "basset_predict.lua -mc_n 10 -rc %s %s %s %s" % (
gpgpu_str,
model_file,
model_input_hdf5,
options.model_out_file,
)
print(torch_cmd)
subprocess.call(torch_cmd, shell=True)
# read in predictions
seqs_preds = np.loadtxt(options.model_out_file)
num_targets = seqs_preds.shape[1]
#################################################################
# parse profile file
#################################################################
activity_profile, profile_weights, profile_mask, target_labels = load_profile(
profile_file, num_targets, options.norm_even, options.weight_zero
)
# normalize predictions
if options.norm_preds:
pred_means = seqs_preds.mean(axis=0)
# save to file for basset_refine.py
np.save("%s/pred_means" % options.out_dir, pred_means)
# aim for profile weighted average
aim_mean = np.average(pred_means[profile_mask], weights=profile_weights[profile_mask])
# normalize
for ti in range(seqs_preds.shape[1]):
ratio_ti = pred_means[ti] / aim_mean
if profile_mask[ti] and (ratio_ti < 1 / 4 or ratio_ti > 4):
print(
"WARNING: target %d with mean %.4f differs 4-fold from the median %.3f"
% (ti, pred_means[ti], aim_mean),
file=sys.stderr,
)
seqs_preds[:, ti] = znorm(seqs_preds[:, ti], pred_means[ti], aim_mean)
#################################################################
# plot clustered heat map limited to relevant targets
#################################################################
seqs_preds_prof = seqs_preds[:, profile_mask]
seqs_preds_var = seqs_preds_prof.var(axis=1)
seqs_sort_var = np.argsort(seqs_preds_var)[::-1]
# heat map
plt.figure()
g = sns.clustermap(
np.transpose(seqs_preds_prof[seqs_sort_var[:1500]]),
metric="cosine",
linewidths=0,
yticklabels=target_labels[profile_mask],
xticklabels=False,
)
plt.setp(g.ax_heatmap.yaxis.get_majorticklabels(), rotation=0)
for label in g.ax_heatmap.yaxis.get_majorticklabels():
label.set_fontsize(options.font_heat)
plt.savefig("%s/heat_clust.pdf" % options.out_dir)
plt.close()
# dimension reduction
# model_pca = PCA(n_components=50)
# spp_pca = model.fit_transform(np.transpose(seqs_preds_prof))
# model = TSNE(n_components=2, perplexity=5, metric='euclidean')
# spp_dr = model.fit_transform(spp_pca)
model = PCA(n_components=2)
spp_dr = model.fit_transform(np.transpose(seqs_preds_prof))
plt.figure()
plt.scatter(spp_dr[:, 0], spp_dr[:, 1], c="black", s=5)
target_labels_prof_concise = [tl.split(":")[-1] for tl in target_labels[profile_mask]]
for label, x, y, activity in zip(
target_labels_prof_concise, spp_dr[:, 0], spp_dr[:, 1], activity_profile[profile_mask]
):
plt.annotate(label, xy=(x, y), size=10, color=sns.color_palette("deep")[int(activity)])
plt.savefig("%s/dim_red.pdf" % options.out_dir)
plt.close()
#################################################################
# compute profile distances
#################################################################
# compute prediction distances
seqs_pdists = []
for si in range(seqs_preds.shape[0]):
# sd = np.power(seqs_preds[si,profile_mask]-activity_profile[profile_mask], 2).sum()
sd = log_loss(
activity_profile[profile_mask], seqs_preds[si, profile_mask], sample_weight=profile_weights[profile_mask]
)
seqs_pdists.append(sd)
seqs_pdists = np.array(seqs_pdists)
# obtain sorted indexes
seqs_sort_dist = np.argsort(seqs_pdists)
# compute target distances
seqs_tdists = []
for si in range(seqs_preds.shape[0]):
tdists = np.absolute(targets[si, profile_mask] - activity_profile[profile_mask])
tdists_weight = np.multiply(tdists, profile_weights[profile_mask])
td = tdists_weight.sum()
seqs_tdists.append(td)
seqs_tdists = np.array(seqs_tdists)
# print as table
table_out = open("%s/table.txt" % options.out_dir, "w")
for si in seqs_sort_dist:
cols = [si, seqs_pdists[si], seqs_tdists[si]] + list(seqs_preds[si, profile_mask])
print("\t".join([str(c) for c in cols]), file=table_out)
table_out.close()
#################################################################
# plot sorted heat map
#################################################################
plt.figure()
g = sns.clustermap(
np.transpose(seqs_preds_prof[seqs_sort_dist[:1000]]),
col_cluster=False,
metric="cosine",
linewidths=0,
yticklabels=target_labels[profile_mask],
xticklabels=False,
)
plt.setp(g.ax_heatmap.yaxis.get_majorticklabels(), rotation=0)
for label in g.ax_heatmap.yaxis.get_majorticklabels():
label.set_fontsize(options.font_heat)
plt.savefig("%s/heat_rank.pdf" % options.out_dir)
plt.close()
#################################################################
# dissect the top hits
#################################################################
satmut_targets = ",".join([str(ti) for ti in range(len(activity_profile)) if profile_mask[ti]])
if gpgpu_str != "":
gpgpu_str = "-%s" % gpgpu_str
for ni in range(options.num_dissect):
si = seqs_sort_dist[ni]
# print FASTA
fasta_file = "%s/seq%d.fa" % (options.out_dir, ni)
fasta_out = open(fasta_file, "w")
print(">%s\n%s" % (seq_headers[si], seqs[si]), file=fasta_out)
fasta_out.close()
# saturated mutagenesis
cmd = "basset_sat.py %s --mc_n 10 -n 500 -o %s/satmut%d -t %s %s %s" % (
gpgpu_str,
options.out_dir,
ni,
satmut_targets,
model_file,
fasta_file,
)
subprocess.call(cmd, shell=True)
# predictions and targets heat
profile_sort = np.argsort(activity_profile[profile_mask])
heat_mat = np.array([activity_profile[profile_mask], targets[si, profile_mask], seqs_preds_prof[si]])
heat_mat = heat_mat[:, profile_sort]
plt.figure()
ax = sns.heatmap(
np.transpose(heat_mat),
yticklabels=target_labels[profile_mask][profile_sort],
xticklabels=["Desired", "Experiment", "Prediction"],
)
plt.setp(ax.xaxis.get_majorticklabels(), rotation=-45)
plt.setp(ax.yaxis.get_majorticklabels(), rotation=-0)
for label in ax.yaxis.get_majorticklabels():
label.set_fontsize(options.font_heat)
plt.savefig("%s/heat%d.pdf" % (options.out_dir, ni))
plt.close()
def main():
usage = 'usage: %prog [options] <model_file> <input_file>'
parser = OptionParser(usage)
parser.add_option(
'-a',
dest='input_activity_file',
help='Optional activity table corresponding to an input FASTA file')
parser.add_option(
'-d',
dest='model_hdf5_file',
default=None,
help='Pre-computed model output as HDF5 [Default: %default]')
parser.add_option(
'-g',
dest='gain_height',
default=False,
action='store_true',
help=
'Nucleotide heights determined by the max of loss and gain [Default: %default]'
)
parser.add_option('-m',
dest='min_limit',
default=0.1,
type='float',
help='Minimum heatmap limit [Default: %default]')
parser.add_option(
'-n',
dest='center_nt',
default=200,
type='int',
help='Center nt to mutate and plot in the heat map [Default: %default]'
)
parser.add_option('-o',
dest='out_dir',
default='heat',
help='Output directory [Default: %default]')
parser.add_option(
'-s',
dest='sample',
default=None,
type='int',
help='Sample sequences from the test set [Default:%default]')
parser.add_option(
'-t',
dest='targets',
default='0',
help=
'Comma-separated list of target indexes to plot (or -1 for all) [Default: %default]'
)
(options, args) = parser.parse_args()
if len(args) != 2:
parser.error(
'Must provide Basset model file and input sequences (as a FASTA file or test data in an HDF file'
)
else:
model_file = args[0]
input_file = args[1]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# parse input file
#################################################################
try:
# input_file is FASTA
# load sequences and headers
seqs = []
seq_headers = []
for line in open(input_file):
if line[0] == '>':
seq_headers.append(line[1:].rstrip())
seqs.append('')
else:
seqs[-1] += line.rstrip()
model_input_hdf5 = '%s/model_in.h5' % options.out_dir
if options.input_activity_file:
# one hot code
seqs_1hot, targets = dna_io.load_data_1hot(
input_file,
options.input_activity_file,
mean_norm=False,
whiten=False,
permute=False,
sort=False)
# read in target names
target_labels = open(
options.input_activity_file).readline().strip().split('\t')
else:
# load sequences
seqs_1hot = dna_io.load_sequences(input_file, permute=False)
targets = None
target_labels = None
# sample
if options.sample:
sample_i = np.array(
random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
if targets is not None:
targets = targets[sample_i]
# reshape sequences for torch
seqs_1hot = seqs_1hot.reshape(
(seqs_1hot.shape[0], 4, 1, seqs_1hot.shape[1] / 4))
# write as test data to a HDF5 file
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
except (IOError, IndexError):
# input_file is HDF5
try:
model_input_hdf5 = input_file
# load (sampled) test data from HDF5
hdf5_in = h5py.File(input_file, 'r')
seqs_1hot = np.array(hdf5_in['test_in'])
targets = np.array(hdf5_in['test_out'])
try: # TEMP
seq_headers = np.array(hdf5_in['test_headers'])
target_labels = np.array(hdf5_in['target_labels'])
except:
seq_headers = None
target_labels = None
hdf5_in.close()
# sample
if options.sample:
sample_i = np.array(
random.sample(xrange(seqs_1hot.shape[0]), options.sample))
seqs_1hot = seqs_1hot[sample_i]
seq_headers = seq_headers[sample_i]
targets = targets[sample_i]
# write sampled data to a new HDF5 file
model_input_hdf5 = '%s/model_in.h5' % options.out_dir
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
except IOError:
parser.error('Could not parse input file as FASTA or HDF5.')
#################################################################
# Torch predict modifications
#################################################################
if options.model_hdf5_file is None:
options.model_hdf5_file = '%s/model_out.h5' % options.out_dir
torch_cmd = 'basset_sat_predict.lua -center_nt %d %s %s %s' % (
options.center_nt, model_file, model_input_hdf5,
options.model_hdf5_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
#################################################################
# load modification predictions
#################################################################
hdf5_in = h5py.File(options.model_hdf5_file, 'r')
seq_mod_preds = np.array(hdf5_in['seq_mod_preds'])
hdf5_in.close()
# trim seqs to match seq_mod_preds length
seq_len = len(seqs[0])
delta_start = 0
delta_len = seq_mod_preds.shape[2]
if delta_len < seq_len:
delta_start = (seq_len - delta_len) / 2
for i in range(len(seqs)):
seqs[i] = seqs[i][delta_start:delta_start + delta_len]
# decide which cells to plot
if options.targets == '-1':
plot_targets = xrange(seq_mod_preds.shape[3])
else:
plot_targets = [int(ci) for ci in options.targets.split(',')]
#################################################################
# plot
#################################################################
table_out = open('%s/table.txt' % options.out_dir, 'w')
rdbu = sns.color_palette("RdBu_r", 10)
nts = 'ACGT'
for si in range(seq_mod_preds.shape[0]):
try:
header = seq_headers[si]
except TypeError:
header = 'seq%d' % si
seq = seqs[si]
# plot some descriptive heatmaps for each individual cell type
for ci in plot_targets:
seq_mod_preds_cell = seq_mod_preds[si, :, :, ci]
real_pred_cell = get_real_pred(seq_mod_preds_cell, seq)
# compute matrices
norm_matrix = seq_mod_preds_cell - real_pred_cell
min_scores = seq_mod_preds_cell.min(axis=0)
max_scores = seq_mod_preds_cell.max(axis=0)
minmax_matrix = np.vstack(
[min_scores - real_pred_cell, max_scores - real_pred_cell])
# prepare figure
sns.set(style='white', font_scale=0.5)
sns.axes_style({'axes.linewidth': 1})
heat_cols = 400
sad_start = 1
sad_end = 323
logo_start = 0
logo_end = 324
fig = plt.figure(figsize=(20, 3))
ax_logo = plt.subplot2grid((3, heat_cols), (0, logo_start),
colspan=(logo_end - logo_start))
ax_sad = plt.subplot2grid((3, heat_cols), (1, sad_start),
colspan=(sad_end - sad_start))
ax_heat = plt.subplot2grid((3, heat_cols), (2, 0),
colspan=heat_cols)
# print a WebLogo of the sequence
vlim = max(options.min_limit, abs(minmax_matrix).max())
if options.gain_height:
seq_heights = 0.25 + 1.75 / vlim * (abs(minmax_matrix).max(
axis=0))
else:
seq_heights = 0.25 + 1.75 / vlim * (-minmax_matrix[0])
logo_eps = '%s/%s_c%d_seq.eps' % (options.out_dir,
header_filename(header), ci)
seq_logo(seq, seq_heights, logo_eps)
# add to figure
logo_png = '%s.png' % logo_eps[:-4]
subprocess.call('convert -density 300 %s %s' %
(logo_eps, logo_png),
shell=True)
logo = Image.open(logo_png)
ax_logo.imshow(logo)
ax_logo.set_axis_off()
# plot loss and gain SAD scores
ax_sad.plot(-minmax_matrix[0],
c=rdbu[0],
label='loss',
linewidth=1)
ax_sad.plot(minmax_matrix[1],
c=rdbu[-1],
label='gain',
linewidth=1)
ax_sad.set_xlim(0, minmax_matrix.shape[1])
ax_sad.legend()
# ax_sad.grid(True, linestyle=':')
for axis in ['top', 'bottom', 'left', 'right']:
ax_sad.spines[axis].set_linewidth(0.5)
# plot real-normalized scores
vlim = max(options.min_limit, abs(norm_matrix).max())
sns.heatmap(norm_matrix,
linewidths=0,
cmap='RdBu_r',
vmin=-vlim,
vmax=vlim,
xticklabels=False,
ax=ax_heat)
ax_heat.yaxis.set_ticklabels('TGCA',
rotation='horizontal') # , size=10)
# save final figure
plt.tight_layout()
plt.savefig('%s/%s_c%d_heat.pdf' %
(options.out_dir, header.replace(':', '_'), ci),
dpi=300)
plt.close()
#################################################################
# print table of nt variability for each cell
#################################################################
for ci in range(seq_mod_preds.shape[3]):
seq_mod_preds_cell = seq_mod_preds[si, :, :, ci]
real_pred_cell = get_real_pred(seq_mod_preds_cell, seq)
min_scores = seq_mod_preds_cell.min(axis=0)
max_scores = seq_mod_preds_cell.max(axis=0)
loss_matrix = real_pred_cell - seq_mod_preds_cell.min(axis=0)
gain_matrix = seq_mod_preds_cell.max(axis=0) - real_pred_cell
for pos in range(seq_mod_preds_cell.shape[1]):
cols = [
header, delta_start + pos, ci, loss_matrix[pos],
gain_matrix[pos]
]
print >> table_out, '\t'.join([str(c) for c in cols])
table_out.close()
def main():
usage = 'usage: %prog [options] <model_file> <profile_file> <input_file>'
parser = OptionParser(usage)
parser.add_option(
'-a',
dest='input_activity_file',
help='Optional activity table corresponding to an input FASTA file')
parser.add_option(
'--all',
dest='all_data',
default=False,
action='store_true',
help=
'Search all training/valid/test sequences. By default we search only the test set. [Default: %default]'
)
parser.add_option('--cuda',
dest='cuda',
default=False,
action='store_true',
help='Run on GPGPU [Default: %default]')
parser.add_option('--cudnn',
dest='cudnn',
default=False,
action='store_true',
help='Run on GPGPU w/cuDNN [Default: %default]')
parser.add_option(
'-d',
dest='model_out_file',
default=None,
help='Pre-computed model predictions output table [Default: %default]')
parser.add_option(
'-e',
dest='norm_even',
default=False,
action='store_true',
help=
'Normalize the weights for the positive and negative datasets to be even [Default: %default]'
)
parser.add_option('-f',
dest='font_heat',
default=6,
type='int',
help='Heat map axis font size [Default: %default]')
parser.add_option('-n',
dest='num_dissect',
default=10,
type='int',
help='Dissect the top n hits [Default: %default]')
parser.add_option('-o',
dest='out_dir',
default='profile',
help='Output directory [Default: %default]')
parser.add_option(
'-r',
dest='norm_preds',
default=False,
action='store_true',
help='Normalize predictions to have equal frequency [Default: %default]'
)
parser.add_option(
'-z',
dest='weight_zero',
default=1.0,
type='float',
help=
'Adjust the weights for the zero samples by this value [Default: %default]'
)
(options, args) = parser.parse_args()
if len(args) != 3:
parser.error(
'Must provide Basset model file, activity profile file, and input sequences (as a FASTA file or test data in an HDF file)'
)
else:
model_file = args[0]
profile_file = args[1]
input_file = args[2]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# parse input file
#################################################################
try:
# input_file is FASTA
# load sequences and headers
seqs = []
seq_headers = []
for line in open(input_file):
if line[0] == '>':
seq_headers.append(line[1:].rstrip())
seqs.append('')
else:
seqs[-1] += line.rstrip()
# convert to arrays
seqs = np.array(seqs)
seq_headers = np.array(seq_headers)
model_input_hdf5 = '%s/model_in.h5' % options.out_dir
if options.input_activity_file:
# one hot code
seqs_1hot, targets = dna_io.load_data_1hot(
input_file,
options.input_activity_file,
mean_norm=False,
whiten=False,
permute=False,
sort=False)
else:
# load sequences
seqs_1hot = dna_io.load_sequences(input_file, permute=False)
targets = None
# reshape sequences for torch
seqs_1hot = seqs_1hot.reshape(
(seqs_1hot.shape[0], 4, 1, seqs_1hot.shape[1] / 4))
# write as test data to a HDF5 file
h5f = h5py.File(model_input_hdf5, 'w')
h5f.create_dataset('test_in', data=seqs_1hot)
h5f.close()
except (IOError, IndexError, UnicodeDecodeError):
# input_file is HDF5
try:
model_input_hdf5 = input_file
# load (sampled) test data from HDF5
hdf5_in = h5py.File(input_file, 'r')
seqs_1hot = np.array(hdf5_in['test_in'])
targets = np.array(hdf5_in['test_out'])
seq_headers = np.array(
[h.decode('UTF-8') for h in hdf5_in['test_headers']])
hdf5_in.close()
# convert to ACGT sequences
seqs = dna_io.vecs2dna(seqs_1hot)
except IOError:
parser.error('Could not parse input file as FASTA or HDF5.')
#################################################################
# Torch predict modifications
#################################################################
# GPU options (needed below, too)
gpgpu_str = ''
if options.cudnn:
gpgpu_str = '-cudnn'
elif options.cuda:
gpgpu_str = '-cuda'
if options.model_out_file is None:
options.model_out_file = '%s/preds.txt' % options.out_dir
torch_cmd = 'basset_predict.lua -mc_n 10 -rc %s %s %s %s' % (
gpgpu_str, model_file, model_input_hdf5, options.model_out_file)
print(torch_cmd)
subprocess.call(torch_cmd, shell=True)
# read in predictions
seqs_preds = np.loadtxt(options.model_out_file)
num_targets = seqs_preds.shape[1]
#################################################################
# parse profile file
#################################################################
activity_profile, profile_weights, profile_mask, target_labels = load_profile(
profile_file, num_targets, options.norm_even, options.weight_zero)
# normalize predictions
if options.norm_preds:
pred_means = seqs_preds.mean(axis=0)
# save to file for basset_refine.py
np.save('%s/pred_means' % options.out_dir, pred_means)
# aim for profile weighted average
aim_mean = np.average(pred_means[profile_mask],
weights=profile_weights[profile_mask])
# normalize
for ti in range(seqs_preds.shape[1]):
ratio_ti = pred_means[ti] / aim_mean
if profile_mask[ti] and (ratio_ti < 1 / 4 or ratio_ti > 4):
print(
'WARNING: target %d with mean %.4f differs 4-fold from the median %.3f'
% (ti, pred_means[ti], aim_mean),
file=sys.stderr)
seqs_preds[:, ti] = znorm(seqs_preds[:, ti], pred_means[ti],
aim_mean)
#################################################################
# plot clustered heat map limited to relevant targets
#################################################################
seqs_preds_prof = seqs_preds[:, profile_mask]
seqs_preds_var = seqs_preds_prof.var(axis=1)
seqs_sort_var = np.argsort(seqs_preds_var)[::-1]
# heat map
plt.figure()
g = sns.clustermap(np.transpose(seqs_preds_prof[seqs_sort_var[:1500]]),
metric='cosine',
linewidths=0,
yticklabels=target_labels[profile_mask],
xticklabels=False)
plt.setp(g.ax_heatmap.yaxis.get_majorticklabels(), rotation=0)
for label in g.ax_heatmap.yaxis.get_majorticklabels():
label.set_fontsize(options.font_heat)
plt.savefig('%s/heat_clust.pdf' % options.out_dir)
plt.close()
# dimension reduction
# model_pca = PCA(n_components=50)
# spp_pca = model.fit_transform(np.transpose(seqs_preds_prof))
# model = TSNE(n_components=2, perplexity=5, metric='euclidean')
# spp_dr = model.fit_transform(spp_pca)
model = PCA(n_components=2)
spp_dr = model.fit_transform(np.transpose(seqs_preds_prof))
plt.figure()
plt.scatter(spp_dr[:, 0], spp_dr[:, 1], c='black', s=5)
target_labels_prof_concise = [
tl.split(':')[-1] for tl in target_labels[profile_mask]
]
for label, x, y, activity in zip(target_labels_prof_concise, spp_dr[:, 0],
spp_dr[:, 1],
activity_profile[profile_mask]):
plt.annotate(label,
xy=(x, y),
size=10,
color=sns.color_palette('deep')[int(activity)])
plt.savefig('%s/dim_red.pdf' % options.out_dir)
plt.close()
#################################################################
# compute profile distances
#################################################################
# compute prediction distances
seqs_pdists = []
for si in range(seqs_preds.shape[0]):
# sd = np.power(seqs_preds[si,profile_mask]-activity_profile[profile_mask], 2).sum()
sd = log_loss(activity_profile[profile_mask],
seqs_preds[si, profile_mask],
sample_weight=profile_weights[profile_mask])
seqs_pdists.append(sd)
seqs_pdists = np.array(seqs_pdists)
# obtain sorted indexes
seqs_sort_dist = np.argsort(seqs_pdists)
# compute target distances
seqs_tdists = []
for si in range(seqs_preds.shape[0]):
tdists = np.absolute(targets[si, profile_mask] -
activity_profile[profile_mask])
tdists_weight = np.multiply(tdists, profile_weights[profile_mask])
td = tdists_weight.sum()
seqs_tdists.append(td)
seqs_tdists = np.array(seqs_tdists)
# print as table
table_out = open('%s/table.txt' % options.out_dir, 'w')
for si in seqs_sort_dist:
cols = [si, seqs_pdists[si], seqs_tdists[si]] + list(
seqs_preds[si, profile_mask])
print('\t'.join([str(c) for c in cols]), file=table_out)
table_out.close()
#################################################################
# plot sorted heat map
#################################################################
plt.figure()
g = sns.clustermap(np.transpose(seqs_preds_prof[seqs_sort_dist[:1000]]),
col_cluster=False,
metric='cosine',
linewidths=0,
yticklabels=target_labels[profile_mask],
xticklabels=False)
plt.setp(g.ax_heatmap.yaxis.get_majorticklabels(), rotation=0)
for label in g.ax_heatmap.yaxis.get_majorticklabels():
label.set_fontsize(options.font_heat)
plt.savefig('%s/heat_rank.pdf' % options.out_dir)
plt.close()
#################################################################
# dissect the top hits
#################################################################
satmut_targets = ','.join(
[str(ti) for ti in range(len(activity_profile)) if profile_mask[ti]])
if gpgpu_str != '':
gpgpu_str = '-%s' % gpgpu_str
for ni in range(options.num_dissect):
si = seqs_sort_dist[ni]
# print FASTA
fasta_file = '%s/seq%d.fa' % (options.out_dir, ni)
fasta_out = open(fasta_file, 'w')
print('>%s\n%s' % (seq_headers[si], seqs[si]), file=fasta_out)
fasta_out.close()
# saturated mutagenesis
cmd = 'basset_sat.py %s --mc_n 10 -n 500 -o %s/satmut%d -t %s %s %s' % (
gpgpu_str, options.out_dir, ni, satmut_targets, model_file,
fasta_file)
subprocess.call(cmd, shell=True)
# predictions and targets heat
profile_sort = np.argsort(activity_profile[profile_mask])
heat_mat = np.array([
activity_profile[profile_mask], targets[si, profile_mask],
seqs_preds_prof[si]
])
heat_mat = heat_mat[:, profile_sort]
plt.figure()
ax = sns.heatmap(np.transpose(heat_mat),
yticklabels=target_labels[profile_mask][profile_sort],
xticklabels=['Desired', 'Experiment', 'Prediction'])
plt.setp(ax.xaxis.get_majorticklabels(), rotation=-45)
plt.setp(ax.yaxis.get_majorticklabels(), rotation=-0)
for label in ax.yaxis.get_majorticklabels():
label.set_fontsize(options.font_heat)
plt.savefig('%s/heat%d.pdf' % (options.out_dir, ni))
plt.close()
def main():
usage = 'usage: %prog [options] <model_file> <test_hdf5_file>'
parser = OptionParser(usage)
parser.add_option(
'-a',
dest='act_t',
default=0.5,
type='float',
help=
'Activation threshold (as proportion of max) to consider for PWM [Default: %default]'
)
parser.add_option('-d',
dest='model_hdf5_file',
default=None,
help='Pre-computed model output as HDF5.')
parser.add_option('-o', dest='out_dir', default='.')
parser.add_option('-m',
dest='meme_db',
default='%s/data/motifs/Homo_sapiens.meme' %
os.environ['BASSETDIR'],
help='MEME database used to annotate motifs')
parser.add_option(
'-p',
dest='plot_heats',
default=False,
action='store_true',
help=
'Plot heat maps describing filter activations in the test sequences [Default: %default]'
)
parser.add_option(
'-s',
dest='sample',
default=None,
type='int',
help='Sample sequences from the test set [Default:%default]')
parser.add_option(
'-t',
dest='trim_filters',
default=False,
action='store_true',
help=
'Trim uninformative positions off the filter ends [Default: %default]')
(options, args) = parser.parse_args()
if len(args) != 2:
parser.error(
'Must provide Basset model file and test data in HDF5 format.')
else:
model_file = args[0]
test_hdf5_file = args[1]
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# load data
#################################################################
# load sequences
test_hdf5_in = h5py.File(test_hdf5_file, 'r')
seq_vecs = np.array(test_hdf5_in['test_in'])
seq_targets = np.array(test_hdf5_in['test_out'])
try:
target_names = list(test_hdf5_in['target_labels'])
except KeyError:
target_names = ['t%d' % ti for ti in range(seq_targets.shape[1])]
test_hdf5_in.close()
#################################################################
# sample
#################################################################
if options.sample is not None:
# choose sampled indexes
sample_i = np.array(
random.sample(xrange(seq_vecs.shape[0]), options.sample))
# filter
seq_vecs = seq_vecs[sample_i]
seq_targets = seq_targets[sample_i]
# create a new HDF5 file
sample_hdf5_file = '%s/sample.h5' % options.out_dir
sample_hdf5_out = h5py.File(sample_hdf5_file, 'w')
sample_hdf5_out.create_dataset('test_in', data=seq_vecs)
sample_hdf5_out.close()
# update test HDF5
test_hdf5_file = sample_hdf5_file
# convert to letters
seqs = dna_io.vecs2dna(seq_vecs)
#################################################################
# Torch predict
#################################################################
if options.model_hdf5_file is None:
options.model_hdf5_file = '%s/model_out.h5' % options.out_dir
torch_cmd = 'basset_motifs_predict.lua %s %s %s' % (
model_file, test_hdf5_file, options.model_hdf5_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# load model output
model_hdf5_in = h5py.File(options.model_hdf5_file, 'r')
filter_weights = np.array(model_hdf5_in['weights'])
filter_outs = np.array(model_hdf5_in['outs'])
model_hdf5_in.close()
# store useful variables
num_filters = filter_weights.shape[0]
filter_size = filter_weights.shape[2]
#################################################################
# individual filter plots
#################################################################
# also save information contents
filters_ic = []
meme_out = meme_intro('%s/filters_meme.txt' % options.out_dir, seqs)
for f in range(num_filters):
print 'Filter %d' % f
# plot filter parameters as a heatmap
plot_filter_heat(filter_weights[f, :, :],
'%s/filter%d_heat.pdf' % (options.out_dir, f))
# write possum motif file
filter_possum(filter_weights[f, :, :], 'filter%d' % f,
'%s/filter%d_possum.txt' % (options.out_dir, f),
options.trim_filters)
# plot weblogo of high scoring outputs
plot_filter_logo(filter_outs[:, f, :],
filter_size,
seqs,
'%s/filter%d_logo' % (options.out_dir, f),
maxpct_t=options.act_t)
# make a PWM for the filter
filter_pwm, nsites = make_filter_pwm('%s/filter%d_logo.fa' %
(options.out_dir, f))
if nsites < 10:
# no information
filters_ic.append(0)
else:
# compute and save information content
filters_ic.append(info_content(filter_pwm))
# add to the meme motif file
meme_add(meme_out, f, filter_pwm, nsites, options.trim_filters)
meme_out.close()
#################################################################
# annotate filters
#################################################################
# run tomtom
subprocess.call(
'tomtom -dist pearson -thresh 0.1 -oc %s/tomtom %s/filters_meme.txt %s'
% (options.out_dir, options.out_dir, options.meme_db),
shell=True)
# read in annotations
filter_names = name_filters(num_filters,
'%s/tomtom/tomtom.txt' % options.out_dir,
options.meme_db)
#################################################################
# print a table of information
#################################################################
table_out = open('%s/table.txt' % options.out_dir, 'w')
# print header for later panda reading
header_cols = ('', 'consensus', 'annotation', 'ic', 'mean', 'std')
print >> table_out, '%3s %19s %10s %5s %6s %6s' % header_cols
for f in range(num_filters):
# collapse to a consensus motif
consensus = filter_motif(filter_weights[f, :, :])
# grab annotation
annotation = '.'
name_pieces = filter_names[f].split('_')
if len(name_pieces) > 1:
annotation = name_pieces[1]
# plot density of filter output scores
fmean, fstd = plot_score_density(
np.ravel(filter_outs[:, f, :]),
'%s/filter%d_dens.pdf' % (options.out_dir, f))
row_cols = (f, consensus, annotation, filters_ic[f], fmean, fstd)
print >> table_out, '%-3d %19s %10s %5.2f %6.4f %6.4f' % row_cols
table_out.close()
#################################################################
# global filter plots
#################################################################
if options.plot_heats:
# plot filter-sequence heatmap
plot_filter_seq_heat(filter_outs,
'%s/filter_seqs.pdf' % options.out_dir)
# plot filter-segment heatmap
plot_filter_seg_heat(filter_outs,
'%s/filter_segs.pdf' % options.out_dir)
plot_filter_seg_heat(filter_outs,
'%s/filter_segs_raw.pdf' % options.out_dir,
whiten=False)
# plot filter-target correlation heatmap
plot_target_corr(filter_outs, seq_targets, filter_names, target_names,
'%s/filter_target_cors_mean.pdf' % options.out_dir,
'mean')
plot_target_corr(filter_outs, seq_targets, filter_names, target_names,
'%s/filter_target_cors_max.pdf' % options.out_dir,
'max')
def main():
usage = 'usage: %prog [options] <model_file>'
parser = OptionParser(usage)
parser.add_option(
'-a',
dest='targets_file',
default=None,
help='File labelings targets in the second column [Default: %default]')
parser.add_option(
'-c',
dest='center_nt',
default=50,
help='Center nt to consider kmers from [Default: %default]')
parser.add_option('-d',
dest='model_out_file',
default=None,
help='Pre-computed model output table.')
parser.add_option('-k',
dest='kmer',
default=8,
type='int',
help='K-mer length [Default: %default]')
parser.add_option('-l',
dest='seq_len',
default=1000,
type='int',
help='Input sequence length [Default: %default]')
parser.add_option(
'-n',
dest='num_seqs',
default=100000,
type='int',
help='Number of sequences to predict [Default: %default]')
parser.add_option('-o', dest='out_dir', default='.')
parser.add_option(
'-r',
dest='rc',
default=False,
action='store_true',
help='Consider k-mers w/ their reverse complements [Default: %default]'
)
parser.add_option(
'-t',
dest='targets',
default=None,
help=
'Comma-separated list of targets to analyze in more depth [Default: %default]'
)
(options, args) = parser.parse_args()
if len(args) != 1:
parser.error('Must provide Basset model file.')
else:
model_file = args[0]
random.seed(2)
if not os.path.isdir(options.out_dir):
os.mkdir(options.out_dir)
#################################################################
# generate random sequences
#################################################################
# random sequences
seq_vecs = np.zeros((options.num_seqs, 4, 1, options.seq_len),
dtype='float16')
for si in range(options.num_seqs):
for li in range(options.seq_len):
ni = random.randint(0, 3)
seq_vecs[si, ni, 0, li] = 1
# create a new HDF5 file
seq_hdf5_file = '%s/seqs.h5' % options.out_dir
seq_hdf5_out = h5py.File(seq_hdf5_file, 'w')
seq_hdf5_out.create_dataset('test_in', data=seq_vecs)
seq_hdf5_out.close()
# get fasta
seq_dna = vecs2dna(seq_vecs)
#################################################################
# Torch predict
#################################################################
if options.model_out_file is None:
options.model_out_file = '%s/model_out.txt' % options.out_dir
torch_cmd = 'basset_predict.lua -scores %s %s %s' % (
model_file, seq_hdf5_file, options.model_out_file)
print torch_cmd
subprocess.call(torch_cmd, shell=True)
# load scores
seq_scores = np.loadtxt(options.model_out_file, dtype='float32')
# read target labels
if options.targets_file:
target_labels = [
line.split()[1] for line in open(options.targets_file)
]
else:
target_labels = ['t%d' % (ti + 1) for ti in range(seq_scores.shape[1])]
if options.targets == None:
options.targets = range(seq_scores.shape[1])
#################################################################
# process and output
#################################################################
kmers_start = (options.seq_len - options.center_nt) / 2
for ti in options.targets:
##############################################
# hash scores by k-mer
##############################################
kmer_scores = {}
for si in range(len(seq_dna)):
# get score
sscore = seq_scores[si, ti]
# hash to each center kmer
for ki in range(kmers_start, kmers_start + options.center_nt):
kmer = seq_dna[si][ki:ki + options.kmer]
if options.rc:
kmer = consider_rc(kmer)
kmer_scores.setdefault(kmer, []).append(sscore)
##############################################
# print table
##############################################
table_out = open('%s/table%d.txt' % (options.out_dir, ti), 'w')
for kmer in kmer_scores:
cols = (kmer, len(kmer_scores[kmer]), np.mean(kmer_scores[kmer]),
np.std(kmer_scores[kmer]) /
math.sqrt(len(kmer_scores[kmer])))
print >> table_out, '%s %4d %6.3f %6.3f' % cols
table_out.close()