def __str__(self):
"""return string representation."""
return "%i\t%i\t%s\t%i\t%i\t%s\t%s\t%6.4e\t%6.4e\t%6.4e" % \
(self.mSampleCountsCategory,
self.mSampleCountsTotal,
IOTools.prettyPercent(
self.mSampleCountsCategory, self.mSampleCountsTotal),
self.mBackgroundCountsCategory,
self.mBackgroundCountsTotal,
IOTools.prettyPercent(
self.mBackgroundCountsCategory, self.mBackgroundCountsTotal),
IOTools.val2str(self.mRatio),
self.mPValue,
self.mProbabilityOverRepresentation,
self.mProbabilityUnderRepresentation)
def __str__(self):
"""return string representation."""
return "%i\t%i\t%s\t%i\t%i\t%s\t%s\t%6.4e\t%6.4e\t%6.4e" % \
(self.mSampleCountsCategory,
self.mSampleCountsTotal,
IOTools.prettyPercent(
self.mSampleCountsCategory, self.mSampleCountsTotal),
self.mBackgroundCountsCategory,
self.mBackgroundCountsTotal,
IOTools.prettyPercent(
self.mBackgroundCountsCategory, self.mBackgroundCountsTotal),
IOTools.val2str(self.mRatio),
self.mPValue,
self.mProbabilityOverRepresentation,
self.mProbabilityUnderRepresentation)
def main(argv=sys.argv):
parser = E.OptionParser(
version="%prog version: $Id: annotator_distance.py 2861 2010-02-23 17:36:32Z andreas $", usage=globals()["__doc__"])
parser.add_option("-a", "--annotations-tsv-file", dest="filename_annotations", type="string",
help="filename mapping gene ids to annotations (a tab-separated table with two-columns) [default=%default].")
parser.add_option("-r", "--resolution", dest="resolution", type="int",
help="resolution of count vector [default=%default].")
parser.add_option("-b", "--num-bins", dest="num_bins", type="int",
help="number of bins in count vector [default=%default].")
parser.add_option("-i", "--num-samples", dest="num_samples", type="int",
help="sample size to compute [default=%default].")
parser.add_option("-w", "--workspace-bed-file", dest="filename_workspace", type="string",
help="filename with workspace information [default=%default].")
parser.add_option("--workspace-builder", dest="workspace_builder", type="choice",
choices=(
"gff", "gtf-intergenic", "gtf-intronic", "gtf-genic"),
help="given a gff/gtf file build a workspace [default=%default].")
parser.add_option("--workspace-labels", dest="workspace_labels", type="choice",
choices=("none", "direction", "annotation"),
help="labels to use for the workspace workspace [default=%default].")
parser.add_option("--sampler", dest="sampler", type="choice",
choices=("permutation", "gaps"),
help="sampler to use. The sampler determines the null model of how segments are distributed in the workspace [default=%default]")
parser.add_option("--counter", dest="counters", type="choice", action="append",
choices=(
"transcription", "closest-distance", "all-distances"),
help="counter to use. The counter computes the quantity of interest [default=%default]")
parser.add_option("--analysis", dest="analysis", type="choice", action="append",
choices=("proximity", "area-under-curve"),
help="analysis to perform [default=%default]")
parser.add_option("--transform-counts", dest="transform_counts", type="choice",
choices=("raw", "cumulative"),
help="cumulate counts [default=%default].")
parser.add_option("-s", "--segments", dest="filename_segments", type="string",
help="filename with segment information [default=%default].")
parser.add_option("--xrange", dest="xrange", type="string",
help="xrange to plot [default=%default]")
parser.add_option("-o", "--logscale", dest="logscale", type="string",
help="use logscale on x, y or xy [default=%default]")
parser.add_option("-p", "--plot", dest="plot", action="store_true",
help="output plots [default=%default]")
parser.add_option("--hardcopy", dest="hardcopy", type="string",
help="output hardcopies to file [default=%default]")
parser.add_option("--no-fdr", dest="do_fdr", action="store_false",
help="do not compute FDR rates [default=%default]")
parser.add_option("--segments-format", dest="segments_format", type="choice",
choices=("gtf", "bed"),
help="format of segments file [default=%default].")
parser.add_option("--truncate", dest="truncate", action="store_true",
help="truncate segments extending beyond a workspace [default=%default]")
parser.add_option("--remove-overhangs", dest="remove_overhangs", action="store_true",
help="remove segments extending beyond a workspace[default=%default]")
parser.add_option("--keep-ambiguous", dest="keep_ambiguous", action="store_true",
help="keep segments extending to more than one workspace [default=%default]")
parser.set_defaults(
filename_annotations=None,
filename_workspace="workspace.gff",
filename_segments="FastDown.gtf",
filename_annotations_gtf="../data/tg1_territories.gff",
workspace_builder="gff",
workspace_labels="none",
sampler="permutation",
truncate=False,
num_bins=10000,
num_samples=10,
resolution=100,
plot_samples=False,
plot_envelope=True,
counters=[],
transform_counts="raw",
xrange=None,
plot=False,
logscale=None,
output_all=False,
do_test=False,
analysis=[],
do_fdr=True,
hardcopy="%s.png",
segments_format="gtf",
remove_overhangs=False,
)
(options, args) = E.Start(parser, argv=argv, add_output_options=True)
###########################################
# setup options
if options.sampler == "permutation":
sampler = SamplerPermutation
elif options.sampler == "gaps":
sampler = SamplerGaps
if options.xrange:
options.xrange = map(float, options.xrange.split(","))
if len(options.counters) == 0:
raise ValueError("please specify at least one counter.")
if len(options.analysis) == 0:
raise ValueError("please specify at least one analysis.")
if options.workspace_labels == "annotation" and not options.filename_annotations:
raise ValueError(
"please specify --annotations-tsv-file is --workspace-labels=annotations.")
###########################################
# read data
if options.workspace_labels == "annotation":
def constant_factory(value):
return itertools.repeat(value).next
def dicttype():
return collections.defaultdict(constant_factory(("unknown",)))
map_id2annotations = IOTools.readMultiMap(open(options.filename_annotations, "r"),
dtype=dicttype)
else:
map_id2annotations = {}
workspace = readWorkspace(open(options.filename_workspace, "r"),
options.workspace_builder,
options.workspace_labels,
map_id2annotations)
E.info("read workspace for %i contigs" % (len(workspace)))
indexed_workspace = indexIntervals(workspace, with_values=True)
segments = readSegments(open(options.filename_segments, "r"), indexed_workspace,
format=options.segments_format,
keep_ambiguous=options.keep_ambiguous,
truncate=options.truncate,
remove_overhangs=options.remove_overhangs)
nsegments = 0
for contig, vv in segments.iteritems():
nsegments += len(vv)
E.info("read %i segments for %i contigs" % (nsegments, len(workspace)))
indexed_segments = indexIntervals(segments, with_values=False)
if nsegments == 0:
E.warn("no segments read - no computation done.")
E.Stop()
return
# build labels
labels = collections.defaultdict(int)
for contig, vv in workspace.iteritems():
for start, end, v in vv:
for l in v[0]:
labels[l] += 1
for l in v[1]:
labels[l] += 1
E.info("found %i workspace labels" % len(labels))
###########################################
# setup counting containers
counters = []
for cc in options.counters:
if cc == "transcription":
counter = CounterTranscription
elif cc == "closest-distance":
counter = CounterClosestDistance
elif cc == "all-distances":
counter = CounterAllDistances
if nsegments < 256:
dtype = numpy.uint8
elif nsegments < 65536:
dtype = numpy.uint16
elif nsegments < 4294967296:
dtype = numpy.uint32
else:
dtype = numpy.int
E.debug("choosen dtype %s" % str(dtype))
E.info("samples space is %i bases: %i bins at %i resolution" %
(options.num_bins * options.resolution,
options.num_bins,
options.resolution,
))
E.info("allocating counts: %i bytes (%i labels, %i samples, %i bins)" %
(options.num_bins * len(labels) * dtype().itemsize * (options.num_samples + 1),
len(labels),
options.num_samples,
options.num_bins,
))
c = CountingResults(labels)
c.mObservedCounts = counter(
labels, options.num_bins, options.resolution, dtype=dtype)
simulated_counts = []
for x in range(options.num_samples):
simulated_counts.append(
counter(labels, options.num_bins, options.resolution, dtype=dtype))
c.mSimulatedCounts = simulated_counts
c.mName = c.mObservedCounts.mName
counters.append(c)
E.info("allocated memory successfully")
segments_per_workspace = []
segment_sizes = []
segments_per_label = collections.defaultdict(int)
workspaces_per_label = collections.defaultdict(int)
############################################
# get observed and simpulated counts
nworkspaces, nempty_workspaces, nempty_contigs, nmiddle = 0, 0, 0, 0
iteration2 = 0
for contig, vv in workspace.iteritems():
iteration2 += 1
E.info("counting %i/%i: %s %i segments" %
(iteration2,
len(workspace),
contig,
len(vv)))
if len(vv) == 0:
continue
iteration1 = 0
for work_start, work_end, v in vv:
left_labels, right_labels = v[0], v[1]
iteration1 += 1
# ignore empty segments
if contig not in indexed_segments:
nempty_contigs += 1
continue
r = indexed_segments[contig].find(work_start, work_end)
segments_per_workspace.append(len(r))
if not r:
nempty_workspaces += 1
continue
# collect segments and stats
nworkspaces += 1
observed = [(x.start, x.end) for x in r]
observed.sort()
segments_per_workspace.append(len(observed))
segment_sizes.extend([x[1] - x[0] for x in observed])
# collect basic counts
for label in list(left_labels) + list(right_labels):
workspaces_per_label[label] += 1
segments_per_label[label] += len(observed)
# add observed counts
for counter in counters:
counter.mObservedCounts.addCounts(
observed, work_start, work_end, left_labels, right_labels)
# create sampler
s = sampler(observed, work_start, work_end)
# add simulated counts
for iteration in range(options.num_samples):
simulated = s.sample()
for counter in counters:
counter.mSimulatedCounts[iteration].addCounts(
simulated, work_start, work_end, left_labels, right_labels)
E.info("counting finished")
E.info("nworkspaces=%i, nmiddle=%i, nempty_workspaces=%i, nempty_contigs=%i" %
(nworkspaces, nmiddle, nempty_workspaces, nempty_contigs))
######################################################
# transform counts
if options.transform_counts == "cumulative":
transform = cumulative_transform
elif options.transform_counts == "raw":
transform = normalize_transform
####################################################
# analysis
if "proximity" in options.analysis:
outfile_proximity = E.openOutputFile("proximity")
outfile_proximity.write("\t".join(("label", "observed", "pvalue",
"expected", "CIlower", "CIupper", "qvalue", "segments", "workspaces")) + "\n")
else:
outfile_proximity = None
if "area-under-curve" in options.analysis:
outfile_auc = E.openOutputFile("auc")
outfile_auc.write("label\tobserved\texpected\tCIlower\tCIupper\n")
else:
outfile_auc = None
# qvalue: expected false positives at p-value
# qvalue = expected false positives /
if options.do_fdr:
E.info("computing pvalues for fdr")
for counter in counters:
for label in labels:
E.info("working on counter:%s label:%s" % (counter, label))
# collect all P-Values of simulated results to compute FDR
sim_pvalues = []
medians = counter.getMedians(label)
for median in medians:
pvalue = float(
scipy.stats.percentileofscore(medians, median)) / 100.0
sim_pvalues.append(pvalue)
sim_pvalues.sort()
else:
sim_pvalues = []
# compute observed p-values
for counter in counters:
counter.update()
obs_pvalues = []
for counter in counters:
for label in labels:
obs_pvalues.append(counter.mStats[label].pvalue)
obs_pvalues.sort()
# compute observed p-values
if options.do_fdr:
for counter in counters:
counter.updateFDR(obs_pvalues, sim_pvalues)
for counter in counters:
outofbounds_sim, totals_sim = 0, 0
outofbounds_obs, totals_obs = 0, 0
for label in labels:
for sample in range(options.num_samples):
if counter.mSimulatedCounts[sample].mOutOfBounds[label]:
E.debug("out of bounds: sample %i, label %s, counts=%i" %
(sample, label, counter.mSimulatedCounts[sample].mOutOfBounds[label]))
outofbounds_sim += counter.mSimulatedCounts[
sample].mOutOfBounds[label]
totals_sim += counter.mSimulatedCounts[sample].mTotals[label]
outofbounds_obs += counter.mObservedCounts.mOutOfBounds[label]
totals_obs += counter.mObservedCounts.mTotals[label]
E.info("out of bounds observations: observed=%i/%i (%5.2f%%), simulations=%i/%i (%5.2f%%)" %
(outofbounds_obs, totals_obs,
100.0 * outofbounds_obs / totals_obs,
outofbounds_sim, totals_sim,
100.0 * outofbounds_sim / totals_sim,
))
for label in labels:
if outfile_auc:
mmin, mmax, mmean = counter.getEnvelope(
label, transform=normalize_transform)
obs = normalize_transform(
counter.mObservedCounts[label], counter.mObservedCounts.mOutOfBounds[label])
def block_iterator(a1, a2, a3, num_bins):
x = 0
while x < num_bins:
while x < num_bins and a1[x] <= a2[x]:
x += 1
start = x
while x < options.num_bins and a1[x] > a2[x]:
x += 1
end = x
total_a1 = a1[start:end].sum()
total_a3 = a3[start:end].sum()
if total_a1 > total_a3:
yield (total_a1 - total_a3, start, end, total_a1, total_a3)
blocks = list(
block_iterator(obs, mmax, mmean, options.num_bins))
if options.output_all:
for delta, start, end, total_obs, total_mean in blocks:
if end - start <= 1:
continue
outfile_auc.write("%s\t%i\t%i\t%i\t%f\t%f\t%f\t%f\t%f\n" %
(label,
start * options.resolution,
end * options.resolution,
(end - start) * options.resolution,
total_obs,
total_mean,
delta,
total_obs / total_mean,
100.0 * (total_obs / total_mean - 1.0)))
# output best block
blocks.sort()
delta, start, end, total_obs, total_mean = blocks[-1]
outfile_auc.write("%s\t%i\t%i\t%i\t%f\t%f\t%f\t%f\t%f\n" %
(label,
start * options.resolution,
end * options.resolution,
(end - start) * options.resolution,
total_obs,
total_mean,
delta,
total_obs / total_mean,
100.0 * (total_obs / total_mean - 1.0)))
if outfile_proximity:
# find error bars at median
st = counter.mStats[label]
outfile_proximity.write("%s\t%i\t%f\t%i\t%i\t%i\t%s\t%i\t%i\n" %
(label,
st.observed *
options.resolution,
st.pvalue,
st.expected *
options.resolution,
st.ci95lower *
options.resolution,
st.ci95upper *
options.resolution,
IOTools.val2str(st.qvalue),
segments_per_label[label],
workspaces_per_label[label],
))
if options.plot:
for counter in counters:
plotCounts(counter, options, transform)
# plot summary stats
plt.figure()
plt.title("distribution of workspace length")
data = []
for contig, segs in workspace.iteritems():
if len(segs) == 0:
continue
data.extend([x[1] - x[0] for x in segs])
vals, bins = numpy.histogram(
data, bins=numpy.arange(0, max(data), 100), new=True)
t = float(sum(vals))
plt.plot(bins[:-1], numpy.cumsum(vals) / t)
plt.gca().set_xscale('log')
plt.legend()
t = float(sum(vals))
plt.xlabel("size of workspace")
plt.ylabel("cumulative relative frequency")
if options.hardcopy:
plt.savefig(
os.path.expanduser(options.hardcopy % "workspace_size"))
plt.figure()
plt.title("segments per block")
vals, bins = numpy.histogram(segments_per_workspace, bins=numpy.arange(
0, max(segments_per_workspace), 1), new=True)
plt.plot(bins[:-1], vals)
plt.xlabel("segments per block")
plt.ylabel("absolute frequency")
if options.hardcopy:
plt.savefig(
os.path.expanduser(options.hardcopy % "segments_per_block"))
plt.figure()
plt.title("workspaces per label")
plt.barh(
range(0, len(labels)), [workspaces_per_label[x] for x in labels], height=0.5)
plt.yticks(range(0, len(labels)), labels)
plt.ylabel("workspaces per label")
plt.xlabel("absolute frequency")
plt.gca().set_xscale('log')
if options.hardcopy:
plt.savefig(
os.path.expanduser(options.hardcopy % "workspaces_per_label"))
plt.figure()
plt.title("segments per label")
plt.barh(range(0, len(labels)), [segments_per_label[x]
for x in labels], height=0.5)
plt.yticks(range(0, len(labels)), labels)
plt.ylabel("segments per label")
plt.xlabel("absolute frequency")
plt.xticks(range(0, len(labels)), labels)
if options.hardcopy:
plt.savefig(
os.path.expanduser(options.hardcopy % "segments_per_label"))
if not options.hardcopy:
plt.show()
E.Stop()
def main(argv=sys.argv):
parser = E.OptionParser(
version=
"%prog version: $Id: annotator_distance.py 2861 2010-02-23 17:36:32Z andreas $",
usage=globals()["__doc__"])
parser.add_option(
"-a",
"--annotations-tsv-file",
dest="filename_annotations",
type="string",
help=
"filename mapping gene ids to annotations (a tab-separated table with two-columns) [default=%default]."
)
parser.add_option("-r",
"--resolution",
dest="resolution",
type="int",
help="resolution of count vector [default=%default].")
parser.add_option(
"-b",
"--num-bins",
dest="num_bins",
type="int",
help="number of bins in count vector [default=%default].")
parser.add_option("-i",
"--num-samples",
dest="num_samples",
type="int",
help="sample size to compute [default=%default].")
parser.add_option(
"-w",
"--workspace-bed-file",
dest="filename_workspace",
type="string",
help="filename with workspace information [default=%default].")
parser.add_option(
"--workspace-builder",
dest="workspace_builder",
type="choice",
choices=("gff", "gtf-intergenic", "gtf-intronic", "gtf-genic"),
help="given a gff/gtf file build a workspace [default=%default].")
parser.add_option(
"--workspace-labels",
dest="workspace_labels",
type="choice",
choices=("none", "direction", "annotation"),
help="labels to use for the workspace workspace [default=%default].")
parser.add_option(
"--sampler",
dest="sampler",
type="choice",
choices=("permutation", "gaps"),
help=
"sampler to use. The sampler determines the null model of how segments are distributed in the workspace [default=%default]"
)
parser.add_option(
"--counter",
dest="counters",
type="choice",
action="append",
choices=("transcription", "closest-distance", "all-distances"),
help=
"counter to use. The counter computes the quantity of interest [default=%default]"
)
parser.add_option("--analysis",
dest="analysis",
type="choice",
action="append",
choices=("proximity", "area-under-curve"),
help="analysis to perform [default=%default]")
parser.add_option("--transform-counts",
dest="transform_counts",
type="choice",
choices=("raw", "cumulative"),
help="cumulate counts [default=%default].")
parser.add_option(
"-s",
"--segments",
dest="filename_segments",
type="string",
help="filename with segment information [default=%default].")
parser.add_option("--xrange",
dest="xrange",
type="string",
help="xrange to plot [default=%default]")
parser.add_option("-o",
"--logscale",
dest="logscale",
type="string",
help="use logscale on x, y or xy [default=%default]")
parser.add_option("-p",
"--plot",
dest="plot",
action="store_true",
help="output plots [default=%default]")
parser.add_option("--hardcopy",
dest="hardcopy",
type="string",
help="output hardcopies to file [default=%default]")
parser.add_option("--no-fdr",
dest="do_fdr",
action="store_false",
help="do not compute FDR rates [default=%default]")
parser.add_option("--segments-format",
dest="segments_format",
type="choice",
choices=("gtf", "bed"),
help="format of segments file [default=%default].")
parser.add_option(
"--truncate",
dest="truncate",
action="store_true",
help="truncate segments extending beyond a workspace [default=%default]"
)
parser.add_option(
"--remove-overhangs",
dest="remove_overhangs",
action="store_true",
help="remove segments extending beyond a workspace[default=%default]")
parser.add_option(
"--keep-ambiguous",
dest="keep_ambiguous",
action="store_true",
help=
"keep segments extending to more than one workspace [default=%default]"
)
parser.set_defaults(
filename_annotations=None,
filename_workspace="workspace.gff",
filename_segments="FastDown.gtf",
filename_annotations_gtf="../data/tg1_territories.gff",
workspace_builder="gff",
workspace_labels="none",
sampler="permutation",
truncate=False,
num_bins=10000,
num_samples=10,
resolution=100,
plot_samples=False,
plot_envelope=True,
counters=[],
transform_counts="raw",
xrange=None,
plot=False,
logscale=None,
output_all=False,
do_test=False,
analysis=[],
do_fdr=True,
hardcopy="%s.png",
segments_format="gtf",
remove_overhangs=False,
)
(options, args) = E.Start(parser, argv=argv, add_output_options=True)
###########################################
# setup options
if options.sampler == "permutation":
sampler = SamplerPermutation
elif options.sampler == "gaps":
sampler = SamplerGaps
if options.xrange:
options.xrange = map(float, options.xrange.split(","))
if len(options.counters) == 0:
raise ValueError("please specify at least one counter.")
if len(options.analysis) == 0:
raise ValueError("please specify at least one analysis.")
if options.workspace_labels == "annotation" and not options.filename_annotations:
raise ValueError(
"please specify --annotations-tsv-file is --workspace-labels=annotations."
)
###########################################
# read data
if options.workspace_labels == "annotation":
def constant_factory(value):
return itertools.repeat(value).next
def dicttype():
return collections.defaultdict(constant_factory(("unknown", )))
map_id2annotations = IOTools.readMultiMap(open(
options.filename_annotations, "r"),
dtype=dicttype)
else:
map_id2annotations = {}
workspace = readWorkspace(open(options.filename_workspace,
"r"), options.workspace_builder,
options.workspace_labels, map_id2annotations)
E.info("read workspace for %i contigs" % (len(workspace)))
indexed_workspace = indexIntervals(workspace, with_values=True)
segments = readSegments(open(options.filename_segments, "r"),
indexed_workspace,
format=options.segments_format,
keep_ambiguous=options.keep_ambiguous,
truncate=options.truncate,
remove_overhangs=options.remove_overhangs)
nsegments = 0
for contig, vv in segments.iteritems():
nsegments += len(vv)
E.info("read %i segments for %i contigs" % (nsegments, len(workspace)))
indexed_segments = indexIntervals(segments, with_values=False)
if nsegments == 0:
E.warn("no segments read - no computation done.")
E.Stop()
return
# build labels
labels = collections.defaultdict(int)
for contig, vv in workspace.iteritems():
for start, end, v in vv:
for l in v[0]:
labels[l] += 1
for l in v[1]:
labels[l] += 1
E.info("found %i workspace labels" % len(labels))
###########################################
# setup counting containers
counters = []
for cc in options.counters:
if cc == "transcription":
counter = CounterTranscription
elif cc == "closest-distance":
counter = CounterClosestDistance
elif cc == "all-distances":
counter = CounterAllDistances
if nsegments < 256:
dtype = numpy.uint8
elif nsegments < 65536:
dtype = numpy.uint16
elif nsegments < 4294967296:
dtype = numpy.uint32
else:
dtype = numpy.int
E.debug("choosen dtype %s" % str(dtype))
E.info("samples space is %i bases: %i bins at %i resolution" % (
options.num_bins * options.resolution,
options.num_bins,
options.resolution,
))
E.info("allocating counts: %i bytes (%i labels, %i samples, %i bins)" %
(
options.num_bins * len(labels) * dtype().itemsize *
(options.num_samples + 1),
len(labels),
options.num_samples,
options.num_bins,
))
c = CountingResults(labels)
c.mObservedCounts = counter(labels,
options.num_bins,
options.resolution,
dtype=dtype)
simulated_counts = []
for x in range(options.num_samples):
simulated_counts.append(
counter(labels,
options.num_bins,
options.resolution,
dtype=dtype))
c.mSimulatedCounts = simulated_counts
c.mName = c.mObservedCounts.mName
counters.append(c)
E.info("allocated memory successfully")
segments_per_workspace = []
segment_sizes = []
segments_per_label = collections.defaultdict(int)
workspaces_per_label = collections.defaultdict(int)
############################################
# get observed and simpulated counts
nworkspaces, nempty_workspaces, nempty_contigs, nmiddle = 0, 0, 0, 0
iteration2 = 0
for contig, vv in workspace.iteritems():
iteration2 += 1
E.info("counting %i/%i: %s %i segments" %
(iteration2, len(workspace), contig, len(vv)))
if len(vv) == 0:
continue
iteration1 = 0
for work_start, work_end, v in vv:
left_labels, right_labels = v[0], v[1]
iteration1 += 1
# ignore empty segments
if contig not in indexed_segments:
nempty_contigs += 1
continue
r = indexed_segments[contig].find(work_start, work_end)
segments_per_workspace.append(len(r))
if not r:
nempty_workspaces += 1
continue
# collect segments and stats
nworkspaces += 1
observed = [(x.start, x.end) for x in r]
observed.sort()
segments_per_workspace.append(len(observed))
segment_sizes.extend([x[1] - x[0] for x in observed])
# collect basic counts
for label in list(left_labels) + list(right_labels):
workspaces_per_label[label] += 1
segments_per_label[label] += len(observed)
# add observed counts
for counter in counters:
counter.mObservedCounts.addCounts(observed, work_start,
work_end, left_labels,
right_labels)
# create sampler
s = sampler(observed, work_start, work_end)
# add simulated counts
for iteration in range(options.num_samples):
simulated = s.sample()
for counter in counters:
counter.mSimulatedCounts[iteration].addCounts(
simulated, work_start, work_end, left_labels,
right_labels)
E.info("counting finished")
E.info(
"nworkspaces=%i, nmiddle=%i, nempty_workspaces=%i, nempty_contigs=%i" %
(nworkspaces, nmiddle, nempty_workspaces, nempty_contigs))
######################################################
# transform counts
if options.transform_counts == "cumulative":
transform = cumulative_transform
elif options.transform_counts == "raw":
transform = normalize_transform
####################################################
# analysis
if "proximity" in options.analysis:
outfile_proximity = E.openOutputFile("proximity")
outfile_proximity.write("\t".join(
("label", "observed", "pvalue", "expected", "CIlower", "CIupper",
"qvalue", "segments", "workspaces")) + "\n")
else:
outfile_proximity = None
if "area-under-curve" in options.analysis:
outfile_auc = E.openOutputFile("auc")
outfile_auc.write("label\tobserved\texpected\tCIlower\tCIupper\n")
else:
outfile_auc = None
# qvalue: expected false positives at p-value
# qvalue = expected false positives /
if options.do_fdr:
E.info("computing pvalues for fdr")
for counter in counters:
for label in labels:
E.info("working on counter:%s label:%s" % (counter, label))
# collect all P-Values of simulated results to compute FDR
sim_pvalues = []
medians = counter.getMedians(label)
for median in medians:
pvalue = float(
scipy.stats.percentileofscore(medians, median)) / 100.0
sim_pvalues.append(pvalue)
sim_pvalues.sort()
else:
sim_pvalues = []
# compute observed p-values
for counter in counters:
counter.update()
obs_pvalues = []
for counter in counters:
for label in labels:
obs_pvalues.append(counter.mStats[label].pvalue)
obs_pvalues.sort()
# compute observed p-values
if options.do_fdr:
for counter in counters:
counter.updateFDR(obs_pvalues, sim_pvalues)
for counter in counters:
outofbounds_sim, totals_sim = 0, 0
outofbounds_obs, totals_obs = 0, 0
for label in labels:
for sample in range(options.num_samples):
if counter.mSimulatedCounts[sample].mOutOfBounds[label]:
E.debug(
"out of bounds: sample %i, label %s, counts=%i" %
(sample, label,
counter.mSimulatedCounts[sample].mOutOfBounds[label]))
outofbounds_sim += counter.mSimulatedCounts[
sample].mOutOfBounds[label]
totals_sim += counter.mSimulatedCounts[sample].mTotals[label]
outofbounds_obs += counter.mObservedCounts.mOutOfBounds[label]
totals_obs += counter.mObservedCounts.mTotals[label]
E.info(
"out of bounds observations: observed=%i/%i (%5.2f%%), simulations=%i/%i (%5.2f%%)"
% (
outofbounds_obs,
totals_obs,
100.0 * outofbounds_obs / totals_obs,
outofbounds_sim,
totals_sim,
100.0 * outofbounds_sim / totals_sim,
))
for label in labels:
if outfile_auc:
mmin, mmax, mmean = counter.getEnvelope(
label, transform=normalize_transform)
obs = normalize_transform(
counter.mObservedCounts[label],
counter.mObservedCounts.mOutOfBounds[label])
def block_iterator(a1, a2, a3, num_bins):
x = 0
while x < num_bins:
while x < num_bins and a1[x] <= a2[x]:
x += 1
start = x
while x < options.num_bins and a1[x] > a2[x]:
x += 1
end = x
total_a1 = a1[start:end].sum()
total_a3 = a3[start:end].sum()
if total_a1 > total_a3:
yield (total_a1 - total_a3, start, end, total_a1,
total_a3)
blocks = list(
block_iterator(obs, mmax, mmean, options.num_bins))
if options.output_all:
for delta, start, end, total_obs, total_mean in blocks:
if end - start <= 1:
continue
outfile_auc.write(
"%s\t%i\t%i\t%i\t%f\t%f\t%f\t%f\t%f\n" %
(label, start * options.resolution,
end * options.resolution,
(end - start) * options.resolution, total_obs,
total_mean, delta, total_obs / total_mean, 100.0 *
(total_obs / total_mean - 1.0)))
# output best block
blocks.sort()
delta, start, end, total_obs, total_mean = blocks[-1]
outfile_auc.write(
"%s\t%i\t%i\t%i\t%f\t%f\t%f\t%f\t%f\n" %
(label, start * options.resolution,
end * options.resolution,
(end - start) * options.resolution, total_obs, total_mean,
delta, total_obs / total_mean, 100.0 *
(total_obs / total_mean - 1.0)))
if outfile_proximity:
# find error bars at median
st = counter.mStats[label]
outfile_proximity.write(
"%s\t%i\t%f\t%i\t%i\t%i\t%s\t%i\t%i\n" % (
label,
st.observed * options.resolution,
st.pvalue,
st.expected * options.resolution,
st.ci95lower * options.resolution,
st.ci95upper * options.resolution,
IOTools.val2str(st.qvalue),
segments_per_label[label],
workspaces_per_label[label],
))
if options.plot:
for counter in counters:
plotCounts(counter, options, transform)
# plot summary stats
plt.figure()
plt.title("distribution of workspace length")
data = []
for contig, segs in workspace.iteritems():
if len(segs) == 0:
continue
data.extend([x[1] - x[0] for x in segs])
vals, bins = numpy.histogram(data,
bins=numpy.arange(0, max(data), 100),
new=True)
t = float(sum(vals))
plt.plot(bins[:-1], numpy.cumsum(vals) / t)
plt.gca().set_xscale('log')
plt.legend()
t = float(sum(vals))
plt.xlabel("size of workspace")
plt.ylabel("cumulative relative frequency")
if options.hardcopy:
plt.savefig(os.path.expanduser(options.hardcopy %
"workspace_size"))
plt.figure()
plt.title("segments per block")
vals, bins = numpy.histogram(segments_per_workspace,
bins=numpy.arange(
0, max(segments_per_workspace), 1),
new=True)
plt.plot(bins[:-1], vals)
plt.xlabel("segments per block")
plt.ylabel("absolute frequency")
if options.hardcopy:
plt.savefig(
os.path.expanduser(options.hardcopy % "segments_per_block"))
plt.figure()
plt.title("workspaces per label")
plt.barh(range(0, len(labels)),
[workspaces_per_label[x] for x in labels],
height=0.5)
plt.yticks(range(0, len(labels)), labels)
plt.ylabel("workspaces per label")
plt.xlabel("absolute frequency")
plt.gca().set_xscale('log')
if options.hardcopy:
plt.savefig(
os.path.expanduser(options.hardcopy % "workspaces_per_label"))
plt.figure()
plt.title("segments per label")
plt.barh(range(0, len(labels)),
[segments_per_label[x] for x in labels],
height=0.5)
plt.yticks(range(0, len(labels)), labels)
plt.ylabel("segments per label")
plt.xlabel("absolute frequency")
plt.xticks(range(0, len(labels)), labels)
if options.hardcopy:
plt.savefig(
os.path.expanduser(options.hardcopy % "segments_per_label"))
if not options.hardcopy:
plt.show()
E.Stop()
