def __init__(self, weight_path, win_size, n_feat, n_class, drop, _blocks,
fc_size):
import tensorflow as tf
from keras import backend as K
from model import cnv_net
K.clear_session()
config = tf.ConfigProto()
# config.gpu_options.allow_growth = True
sess = tf.Session(config=config)
K.set_session(sess)
model_name = 'cnvnet'
self.model = cnv_net(win_size,
n_feat,
n_class,
filters=32,
kernel_size=16,
strides=1,
pool_size=2,
pool_stride=2,
drop=drop,
blocks=_blocks,
fc_size=fc_size,
kernel_regular_l2=None,
m_name=model_name)
self.model.load_weights(weight_path)
def __init__(self, weight_path, win_size, n_feat, n_class, drop, _blocks,
fc_size, l2ratio, temp, filters, kernel_size):
import tensorflow as tf
from keras import backend as K
from model import cnv_net
K.clear_session()
config = tf.ConfigProto()
config.gpu_options.per_process_gpu_memory_fraction = 0.2 # (2core)0.3->0.15(4core)
sess = tf.Session(config=config)
K.set_session(sess)
model_name = 'cnvnet'
self.model = cnv_net(win_size,
n_feat,
n_class,
filters=filters,
kernel_size=kernel_size,
strides=1,
pool_size=2,
pool_stride=2,
drop=drop,
blocks=_blocks,
fc_size=fc_size,
kernel_regular_l2=l2ratio,
temperature=temp,
m_name=model_name)
self.model.load_weights(weight_path)
def __init__(self,
weight_path,
win_size,
n_feat,
n_class,
drop,
_blocks,
fc_size,
n_proc=10):
import tensorflow as tf
from keras import backend as K
from model import cnv_net
K.clear_session()
config = tf.ConfigProto(device_count={"CPU": n_proc},
intra_op_parallelism_threads=1,
inter_op_parallelism_threads=1)
sess = tf.Session(config=config)
K.set_session(sess)
model_name = 'cnvnet'
self.model = cnv_net(win_size,
n_feat,
n_class,
filters=32,
kernel_size=16,
strides=1,
pool_size=2,
pool_stride=2,
drop=drop,
blocks=_blocks,
fc_size=fc_size,
kernel_regular_l2=None,
m_name=model_name)
self.model.load_weights(weight_path)
def __load_model(self, model_weight_fn):
logger.info('loading model weight...')
assert os.path.exists(model_weight_fn)
model_weight_name = os.path.splitext(os.path.basename(model_weight_fn))[0]
model_in_lst = model_weight_name.split('-')
model_name = model_in_lst[1]
model_params_lst = re.findall(r"[-+]?\d*\.\d+|\d+", model_in_lst[0])
logging.info('model name: {0}, model params(batch, epoch, lr, drop, fc, block, win): {1}'.format(
model_name, model_params_lst))
assert len(model_params_lst) >= 6
batch_size = int(model_params_lst[0])
drop = float(model_params_lst[3])
fc_size = int(model_params_lst[4])
blocks = (int(x) for x in model_params_lst[5])
win_size = int(model_params_lst[6])
model = None
if model_name == 'cnvnet':
model = cnv_net(win_size, self.n_features, self.n_classes,
drop=drop, blocks=blocks, fc_size=fc_size)
model.load_weights(model_weight_fn)
return model, batch_size
def online_call(online_seg_data_root_dir,
online_call_out_root_dir,
model_in_root_dir,
n_win_size=1000,
n_feat=13,
n_class=3,
epochs=64,
batch=1024,
learn_rate=0.001,
drop=0.5,
fc_size=64,
blocks='4_4_3',
step_size=200,
sample_id='NA12878',
chr_id='1',
min_ratio=0.1,
seg_range='a',
cost_mat='221',
n_proc=10):
# get model name
_blocks = (int(x) for x in blocks.split('_'))
def out_name():
str_blocks = [str(x) for x in blocks.split('_')]
str_blk = ''.join(str_blocks)
return 'b{0}_e{1}_lr{2:.3f}_dr{3:.1f}_fc{4}_blk{5}_win{6}_cw{7}'.format(
batch, epochs, learn_rate, drop, fc_size, str_blk, n_win_size,
cost_mat)
# set enviornment
time.sleep(10)
os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
logger.info('waiting available gpu device...')
while True:
gpu_id_lst = GPU.getFirstAvailable(order='random',
maxMemory=0.001,
maxLoad=0.001,
attempts=50,
interval=60)
if len(gpu_id_lst) > 0:
break
logger.info('processing on device id {}...'.format(gpu_id_lst[0]))
os.environ["CUDA_VISIBLE_DEVICES"] = str(gpu_id_lst[0])
logger.info('loading model...')
K.clear_session()
config = tf.ConfigProto(device_count={"CPU": n_proc},
intra_op_parallelism_threads=1,
inter_op_parallelism_threads=1)
config.gpu_options.allow_growth = True
sess = tf.Session(config=config)
K.set_session(sess)
model_name = 'cnvnet'
model = cnv_net(n_win_size,
n_feat,
n_class,
filters=32,
kernel_size=16,
strides=1,
pool_size=2,
pool_stride=2,
drop=drop,
blocks=_blocks,
fc_size=fc_size,
kernel_regular_l2=None,
m_name=model_name)
model_weight_fn = os.path.join(model_in_root_dir,
out_name() + '-' + model_name + '.hdf5')
if not os.path.exists(model_weight_fn):
raise FileNotFoundError(
'model weight file not found. {}'.format(model_weight_fn))
model.load_weights(model_weight_fn)
# load data
# default: online_seg_data_root_dir = '/zfssz2/ST_MCHRI/BIGDATA/PROJECT/NIPT_CNV/f_cnv_out/online'
online_seg_data_subroot_dir = os.path.join(online_seg_data_root_dir,
sample_id + '/data')
if not os.path.isdir(online_seg_data_subroot_dir):
raise FileNotFoundError(
'No segments generated for sample {}, chr {}'.format(
sample_id, chr_id))
part_fname = 'win{0}_step{1}_r{2:.2f}_chr{3}_seg_'.format(
n_win_size, step_size, min_ratio, chr_id)
# create out dir
# default: online_call_out_root_dir = '/zfssz2/ST_MCHRI/BIGDATA/PROJECT/NIPT_CNV/f_cnv_out/online'
online_call_out_subroot_dir = os.path.join(online_call_out_root_dir,
sample_id + '/cnv_call')
if not os.path.isdir(online_call_out_subroot_dir):
os.mkdir(online_call_out_subroot_dir)
call_out_fn = os.path.join(
online_call_out_subroot_dir,
'win{0}_step{1}_r{2:.2f}_chr{3}-cnv-call-'.format(
n_win_size, step_size, min_ratio, chr_id))
if seg_range != 'a': # if not whole chr
part_fname = part_fname + 'p-' + seg_range + '_'
call_out_fn = call_out_fn + 'p-' + seg_range + '-'
else:
part_fname = part_fname + 'a_'
call_out_fn = call_out_fn + 'a-'
call_out_fn = call_out_fn + 'result.csv'
if os.path.exists(call_out_fn):
os.remove(call_out_fn)
gap_h5_fn = os.path.join(online_seg_data_subroot_dir,
part_fname + 'gap.h5')
gap_pred = None
if os.path.exists(gap_h5_fn):
with h5py.File(gap_h5_fn, 'r') as gap_fn_read:
gap_obj = gap_fn_read.get('gap')
if gap_obj:
gap_result = gap_obj.value
tmp_arr = np.full((gap_result.shape[0], 4), -1)
# tmp_arr[:] = np.nan
gap_pred = np.concatenate((gap_result, tmp_arr), axis=1)
del tmp_arr
unpred_h5_fn_list = glob.glob(
os.path.join(online_seg_data_subroot_dir, part_fname + 'unpred_*'))
f_unpred_arr = None
for i_unpred_fn in unpred_h5_fn_list:
with h5py.File(i_unpred_fn, 'r') as i_uppred_fn_read:
i_unpred_meta = i_uppred_fn_read.get('unpred_meta').value
i_unpred_meta_arr = np.array(i_unpred_meta)
tmp_arr = np.full((i_unpred_meta_arr.shape[0], 4), -1)
# tmp_arr[:] = np.nan
if f_unpred_arr is None:
f_unpred_arr = np.concatenate((i_unpred_meta_arr, tmp_arr), axis=1)
else:
unpred_arr = np.concatenate((i_unpred_meta_arr, tmp_arr), axis=1)
f_unpred_arr = np.concatenate((f_unpred_arr, unpred_arr), axis=0)
pred_h5_fn_list = glob.glob(
os.path.join(online_seg_data_subroot_dir, part_fname + 'pred_*'))
logger.info('calling cnv...')
f_pred_res = None
for i, i_fn in enumerate(pred_h5_fn_list):
logger.info('processing {}/{}:{}'.format(i + 1, len(pred_h5_fn_list),
i_fn))
with h5py.File(i_fn, 'r') as i_fn_read:
i_fn_pred_meta = i_fn_read.get('pred_meta').value
i_fn_pred_feat = i_fn_read.get('pred_feat').value
i_feat_arr = np.array(i_fn_pred_feat)
del i_fn_pred_feat
ypred = model.predict_on_batch(i_feat_arr)
ypred_l = np.argmax(ypred, axis=1)
assert len(i_fn_pred_meta) == ypred.shape[0]
if f_pred_res is None:
f_pred_res = np.concatenate(
(np.array(i_fn_pred_meta), ypred, ypred_l[:, np.newaxis]),
axis=1)
else:
i_pred_res = np.concatenate(
(np.array(i_fn_pred_meta), ypred, ypred_l[:, np.newaxis]),
axis=1)
f_pred_res = np.concatenate((f_pred_res, i_pred_res), axis=0)
logger.info('combining and sorting results...')
# check
if gap_pred is not None and f_unpred_arr is not None and f_pred_res is not None:
whl_cnv_re = np.concatenate((gap_pred, f_unpred_arr, f_pred_res),
axis=0)
elif gap_pred is not None and f_unpred_arr is not None and f_pred_res is None:
whl_cnv_re = np.concatenate((gap_pred, f_unpred_arr), axis=0)
elif gap_pred is not None and f_pred_res is not None and f_unpred_arr is None:
whl_cnv_re = np.concatenate((gap_pred, f_pred_res), axis=0)
elif gap_pred is None and f_unpred_arr is not None and f_pred_res is not None:
whl_cnv_re = np.concatenate((f_unpred_arr, f_pred_res), axis=0)
elif f_pred_res is None and f_unpred_arr is None and gap_pred is not None:
whl_cnv_re = gap_pred.copy()
elif gap_pred is None and f_unpred_arr is None and f_pred_res is not None:
whl_cnv_re = f_pred_res.copy()
elif f_pred_res is None and gap_pred is None and f_unpred_arr is not None:
whl_cnv_re = f_unpred_arr.copy()
del gap_pred, f_unpred_arr, f_pred_res
ind = np.argsort(whl_cnv_re[:, 0])
whl_cnv_re = whl_cnv_re[ind]
out_df = pd.DataFrame(data=whl_cnv_re,
columns=[
'seg_s', 'seg_e', 'seg_l', 'indicator', 'p_neu',
'p_del', 'p_dup', 'pred_l'
])
out_df[['seg_s', 'seg_e', 'seg_l', 'indicator', 'pred_l'
]] = out_df[['seg_s', 'seg_e', 'seg_l', 'indicator',
'pred_l']].astype(int)
out_df.to_csv(call_out_fn, index=False, sep='\t')
logger.info(
'Done, online cnv call results saved into {}'.format(call_out_fn))
def train(training_generator, validation_data, model_root_dir, epochs=50, batch=256,
learn_rate=0.001, drop=0.5, fc_size=128, blocks='4_4_3', n_gpu=4, n_cpu=10):
"""
epoch from 50 -> 60
:param x_train:
:param y_train:
:param model_root_dir:
:param epochs:
:param batch:
:param learn_rate:
:param drop:
:param fc_size:
:param blocks:
:param n_gpu:
:return:
"""
# n_example, n_win_size, n_feat = x_train.shape
n_win_size =1000
n_class = 3
n_feat=13
# k_x_train1, k_x_val1, k_y_train1, k_y_val1 = train_test_split(x_train, y_train, test_size=0.2, random_state=123)
# nb_trains = k_x_train1.shape[0] // batch
# nb_examples = batch * nb_trains
# k_x_train = k_x_train1[:nb_examples]
# k_y_train = k_y_train1[:nb_examples]
# k_x_val = np.concatenate((k_x_val1, k_x_train1[nb_examples:]), axis=0)
# k_y_val = np.concatenate((k_y_val1, k_y_train1[nb_examples:]), axis=0)
# del k_x_train1, k_x_val1, k_y_train1, k_y_val1
gc.collect()
def out_name():
str_blocks = [str(x) for x in blocks.split('_')]
str_blk = ''.join(str_blocks)
return 'b{0}_e{1}_lr{2:.3f}_dr{3:.1f}_fc{4}_blk{5}_win{6}'.format(batch,
epochs,
learn_rate,
drop,
fc_size,
str_blk,
n_win_size)
_blocks = (int(x) for x in blocks.split('_'))
K.clear_session()
# config = tf.ConfigProto()
config = tf.ConfigProto(device_count={'GPU': n_gpu, 'CPU': n_cpu})
config.gpu_options.allow_growth = True
sess = tf.Session(config=config)
K.set_session(sess)
model_name = 'cnvnet'
base_model = cnv_net(n_win_size, n_feat, n_class, filters=32, kernel_size=16, strides=1, pool_size=2,
pool_stride=2, drop=drop, blocks=_blocks, fc_size=fc_size,
kernel_regular_l2=None, m_name=model_name)
# base_model = cnv_net_seq(n_win_size, n_feat, n_class)
if n_gpu > 1:
model = multi_gpu_model(base_model, n_gpu)
else:
model = base_model
_model_dir = os.path.join(model_root_dir, 'final_model/model_weight')
if not os.path.isdir(_model_dir):
os.makedirs(_model_dir)
_tb_dir = os.path.join(model_root_dir, 'final_model/tb_logs')
if not os.path.isdir(_tb_dir):
os.makedirs(_tb_dir)
_csvlogger_dir = os.path.join(model_root_dir, 'final_model/model_csvlogger')
if not os.path.isdir(_csvlogger_dir):
os.makedirs(_csvlogger_dir)
model_fn = os.path.join(_model_dir, '{}-{}.hdf5'.format(out_name(), model_name))
tensorboard_fn = os.path.join(_tb_dir, '{}-{}'.format(out_name(), model_name))
csvlogger_fn = os.path.join(_csvlogger_dir, '{}-{}'.format(out_name(), model_name))
callbacks = [
# Early stopping definition
EarlyStopping(monitor='val_acc', patience=5, verbose=1),
# Decrease learning rate by 0.5 factor
AdvancedLearnignRateScheduler(monitor='val_acc', patience=1, verbose=1, mode='auto', decayRatio=0.5),
# Saving best model
MultiGPUCheckpointCallback(model_fn, base_model=base_model, monitor='val_acc',
save_best_only=True, verbose=1, save_weights_only=True),
TensorBoard(tensorboard_fn, batch_size=batch, histogram_freq=2),
CSVLogger(csvlogger_fn)
]
model.compile(optimizer=keras.optimizers.Adam(lr=learn_rate),
loss='categorical_crossentropy',
metrics=['accuracy'])
# model.fit(k_x_train, k_y_train, validation_data=(k_x_val, k_y_val),
# epochs=epochs, batch_size=batch, callbacks=callbacks)
model.fit_generator(generator=training_generator,
validation_data=validation_data,
epochs=5,
use_multiprocessing=True,
workers=10)
def evaluate(model_root_dir, total_samples_ls_fn, test_ratio, win_size,
min_size, min_r, min_f_deldup, min_f_neu, is_norm,
model_weight_fn):
xtest = []
ytest = []
# load test data set
test_set_fn = os.path.join(
model_root_dir, 'test{:.2f}_win{}_minsize{}_dataset.npz'.format(
test_ratio, win_size, min_size))
if os.path.exists(test_set_fn):
with np.load(test_set_fn) as test_set:
xtest = test_set['x_test']
ytest = test_set['y_test']
else:
from keras.utils import to_categorical
_, test_ids = get_train_test_ids(model_root_dir, total_samples_ls_fn,
test_ratio)
x_test = []
y_test_ = []
for ix, test_id in enumerate(test_ids):
x, y = get_data(test_id, model_root_dir, win_size, min_r,
min_f_deldup, min_f_neu, is_norm)
if (not (x is None)) and (not (y is None)):
if len(x_test) == 0:
x_test = x
y_test_ = y
else:
x_test = np.concatenate((x_test, x), axis=0)
y_test_ = np.concatenate((y_test_, y))
y_ = [1 if x == 'DEL' else 2 if x == 'DUP' else 0 for x in y_test_]
y_test = to_categorical(y_)
logger.info('x test: {}, y test: {}'.format(x_test.shape,
y_test.shape))
np.savez_compressed(test_set_fn, x_test=x_test, y_test=y_test)
xtest = x_test
ytest = y_test
n_example, n_win_size, n_feat = xtest.shape
n_class = ytest.shape[1]
model_weight_name = os.path.splitext(os.path.basename(model_weight_fn))[0]
model_in_lst = model_weight_name.split('-')
model_name = model_in_lst[1]
model_params_lst = re.findall(r"[-+]?\d*\.\d+|\d+", model_in_lst[0])
logging.info(
'model name: {0}, model params(batch, epoch, lr, drop, fc, block, win): {1}'
.format(model_name, model_params_lst))
assert len(model_params_lst) >= 6
drop = float(model_params_lst[3])
fc_size = int(model_params_lst[4])
blocks = (int(x) for x in model_params_lst[5])
model = None
if model_name == 'cnvnet':
model = cnv_net(n_win_size,
n_feat,
n_class,
drop=drop,
blocks=blocks,
fc_size=fc_size)
model.load_weights(model_weight_fn)
logging.info("finished loading model!")
ypred = model.predict(xtest)
test_pred_fn = os.path.join(
model_root_dir, 'test_out/test{:.2f}_win{}_minsize{}_pred.npz'.format(
test_ratio, win_size, min_size))
np.savez_compressed(test_pred_fn, ypred=ypred, ytrue=ytest)
logger.info('Predict Done, result saved at {}'.format(test_pred_fn))
def evaluate(test_sample_fn, test_out_root_dir, model_in_root_dir,
n_win_size=1000, n_feat=13, n_class=3,
epochs=64, batch=1024, learn_rate=0.001, drop=0.5,
fc_size=64, blocks='4_4_3', n_cpu=20, class_weights=None):
# get model name
_blocks = tuple(int(x) for x in blocks.split('_'))
def out_name():
str_blocks = [str(x) for x in blocks.split('_')]
str_blk = ''.join(str_blocks)
if class_weights is not None:
class_weight_label = ''.join(np.array([class_weights[1], class_weights[2], class_weights[0]]).astype(str))
else:
class_weight_label = '111'
return 'b{0}_e{1}_lr{2:.3f}_dr{3:.1f}_fc{4}_blk{5}_win{6}_cw{7}'.format(batch,
epochs,
learn_rate,
drop,
fc_size,
str_blk,
n_win_size,
class_weight_label)
logger.info('loading model... ')
K.clear_session()
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
sess = tf.Session(config=config)
K.set_session(sess)
model_name = 'cnvnet'
model = cnv_net(n_win_size, n_feat, n_class, filters=32, kernel_size=16, strides=1, pool_size=2,
pool_stride=2, drop=drop, blocks=_blocks, fc_size=fc_size,
kernel_regular_l2=None, m_name=model_name)
model_weight_fn = os.path.join(model_in_root_dir, out_name() + '-' + model_name + '.hdf5')
if not os.path.exists(model_weight_fn):
raise FileNotFoundError('model weight file not found. {}'.format(model_weight_fn))
model.load_weights(model_weight_fn)
test_out_dir = os.path.join(test_out_root_dir, 'test_out')
if not os.path.isdir(test_out_dir):
os.mkdir(test_out_dir)
test_out_fn = os.path.join(test_out_dir, out_name() + '-offline-test.h5')
test_sample_df = pd.read_csv(test_sample_fn, sep='\t')
# slow when using generator
test_samples_fn_arr = test_sample_df[['f_name']].values
test_samples_true_arr = test_sample_df['cnv_type_encode'].values
test_batch_generator = CNVDataGenerator(test_samples_fn_arr, batch,
win_size=n_win_size, n_feat=n_feat, n_classes=n_class,
shuffle=False, pred_gen=True)
# use predict_generator will produce only batch_size * n outputs
ypred = model.predict_generator(test_batch_generator,
verbose=1, use_multiprocessing=True,
workers=n_cpu, max_queue_size=64)
logger.info('writing predicted results into file...')
with h5py.File(test_out_fn, 'w') as test_out:
test_out.create_dataset('ypred', data=ypred)
test_out.create_dataset('ytrue', data=test_samples_true_arr)
logger.info('Predict Done, result saved at {}'.format(test_out_fn))
def train3(target_train_h5_fn,
target_val_h5_fn,
model_out_root_dir,
n_win_size=5000,
n_feat=13,
n_class=3,
filters=32,
kernel_size=16,
epochs=64,
batch=1024,
learn_rate=0.001,
drop=0.5,
fc_size=64,
blocks='4_4_3',
l2r=1e-4,
temperature=5,
lbl_smt_frac=0.1,
pw=0,
n_gpu=4,
n_cpu=20):
_blocks = tuple(int(x) for x in blocks.split('_'))
def out_name():
str_blocks = [str(x) for x in blocks.split('_')]
str_blk = ''.join(str_blocks)
return 'b{0}_ep{1}_lr{2:.3f}_dr{3:.1f}_fc{4}_' \
'blk{5}_win{6}_l2r{7}_temp{8}_lblsmt{9}_pw{10}'.format(batch,
epochs,
learn_rate,
drop,
fc_size,
str_blk,
n_win_size,
str(l2r),
temperature,
int(
lbl_smt_frac) if lbl_smt_frac == 0 else lbl_smt_frac,
pw)
K.clear_session()
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
sess = tf.Session(config=config)
K.set_session(sess)
model_name = 'cnvnet'
base_model = cnv_net(n_win_size,
n_feat,
n_class,
filters=filters,
kernel_size=kernel_size,
strides=1,
pool_size=2,
pool_stride=2,
drop=drop,
blocks=_blocks,
fc_size=fc_size,
kernel_regular_l2=l2r,
temperature=temperature,
m_name=model_name)
# base_model = cnv_net_seq(n_win_size, n_feat, n_class)
if n_gpu > 1:
model = multi_gpu_model(base_model, n_gpu)
else:
model = base_model
_model_dir = os.path.join(model_out_root_dir, 'model_weight')
if not os.path.isdir(_model_dir):
os.mkdir(_model_dir)
_tb_dir = os.path.join(model_out_root_dir, 'tb_logs')
if not os.path.isdir(_tb_dir):
os.mkdir(_tb_dir)
_csvlogger_dir = os.path.join(model_out_root_dir, 'model_csvlogger')
if not os.path.isdir(_csvlogger_dir):
os.mkdir(_csvlogger_dir)
model_fn = os.path.join(_model_dir,
'{}-{}.hdf5'.format(out_name(), model_name))
if os.path.exists(model_fn):
os.remove(model_fn)
tensorboard_fn = os.path.join(_tb_dir,
'{}-{}'.format(out_name(), model_name))
if os.path.isdir(tensorboard_fn):
shutil.rmtree(tensorboard_fn, ignore_errors=True)
csvlogger_fn = os.path.join(_csvlogger_dir,
'{}-{}'.format(out_name(), model_name))
if os.path.exists(csvlogger_fn):
os.remove(csvlogger_fn)
with h5py.File(target_train_h5_fn, 'r') as train_h5:
train_len = train_h5['x'].shape[0]
with h5py.File(target_val_h5_fn, 'r') as val_h5:
val_len = val_h5['x'].shape[0]
callbacks = [
# Early stopping definition
EarlyStopping(monitor='val_fmeasure',
mode='max',
patience=10,
verbose=1),
# Decrease learning rate by 0.5 factor
AdvancedLearnignRateScheduler(monitor='val_fmeasure',
patience=1,
verbose=1,
mode='max',
decayRatio=0.5),
# CyclicLR(mode='triangular', base_lr=learn_rate, max_lr=0.1, step_size=6 * (train_len // batch)),
# Saving best model
MultiGPUCheckpointCallback(model_fn,
base_model=base_model,
monitor='val_fmeasure',
mode='max',
save_best_only=True,
verbose=1,
save_weights_only=True),
# histogram_freq=0 because
# ValueError: If printing histograms, validation_data must be provided, and cannot be a generator
# set histogram_freq=0 to solve the problem
# TensorBoard(tensorboard_fn, batch_size=batch, histogram_freq=0),
CSVLogger(csvlogger_fn)
]
# fine tune the cost function so that missclassification is weighted some how
p_misclass_weight = np.ones((n_class, n_class))
# there could be improved
# penalizing FN
p_misclass_weight[:, 0] = 2.0
# penalizing FP
p_misclass_weight[0, :] = 2.0
p_misclass_weight[1, 2] = 2.0
p_misclass_weight[2, 1] = 2.0
p_misclass_weight[0, 0] = 1.0
p_misclass_weight2 = np.ones((n_class, n_class))
# there could be improved
# penalizing FN
p_misclass_weight2[:, 0] = 2.0
# penalizing FP
p_misclass_weight2[0, :] = 1.5
p_misclass_weight2[0, 0] = 1.0
misclass_dict = {1: p_misclass_weight, 2: p_misclass_weight2}
# using weight loss funtion
# https://github.com/keras-team/keras/issues/2115
if pw > 0:
custom_loss = partial(w_categorical_crossentropy,
weights=misclass_dict[pw])
custom_loss.__name__ = 'w_categorical_crossentropy'
elif pw == 0:
custom_loss = 'categorical_crossentropy'
elif pw == -1:
custom_loss = focal_loss(alpha=1.0)
elif pw == -2:
custom_loss = combine_tversky_focal_loss(alpha_t=0.2,
beta_t=0.8,
gamma_f=2.,
alpha_f=1.)
elif pw == -3:
custom_loss = combine_weighted_ce_focal_loss(weights=misclass_dict[1],
gamma_f=2.,
alpha_f=1.)
elif pw == -4:
custom_loss = combine_tversky_focal_loss(alpha_t=1,
beta_t=1,
gamma_f=2.,
alpha_f=1.)
elif pw == -5:
custom_loss = tversky_loss(alpha=0.5, beta=0.5)
elif pw == -6:
custom_loss = tversky_loss(alpha=0.8, beta=0.2)
elif pw == -7:
custom_loss = tversky_loss(alpha=0.1, beta=0.9)
elif pw == -8:
custom_loss = combine_tversky_focal_loss(alpha_t=0.8,
beta_t=0.2,
gamma_f=2.,
alpha_f=1.)
custom_loss.__name__ = 'tversky_focal_loss'
elif pw == -9:
custom_loss = combine_tversky_focal_loss(alpha_t=4.0,
beta_t=2.0,
gamma_f=2.,
alpha_f=1.)
elif pw == -10:
custom_loss = combine_tversky_focal_loss(alpha_t=0.8,
beta_t=0.2,
gamma_f=4.,
alpha_f=1.)
elif pw == -11:
custom_loss = combine_tversky_focal_loss(alpha_t=0.8,
beta_t=0.2,
gamma_f=1.5,
alpha_f=1.)
elif pw == -12:
custom_loss = combine_tversky_focal_loss(alpha_t=0.7,
beta_t=0.3,
gamma_f=2,
alpha_f=1.)
elif pw == -13:
custom_loss = combine_tversky_focal_loss(alpha_t=0.8,
beta_t=0.2,
gamma_f=2.5,
alpha_f=1.)
elif pw == -14:
custom_loss = combine_tversky_focal_loss(alpha_t=0.8,
beta_t=0.2,
gamma_f=3,
alpha_f=1.)
elif pw == -15: # call
custom_loss = combine_tversky_focal_loss(alpha_t=0.9,
beta_t=0.1,
gamma_f=2.0,
alpha_f=1.)
elif pw == -16:
custom_loss = combine_tversky_focal_loss(alpha_t=0.6,
beta_t=0.4,
gamma_f=2.0,
alpha_f=1.)
elif pw == -17:
custom_loss = combine_tversky_focal_loss(alpha_t=0.7,
beta_t=0.3,
gamma_f=1.5,
alpha_f=1.)
elif pw == -18:
custom_loss = combine_tversky_focal_loss(alpha_t=0.6,
beta_t=0.4,
gamma_f=1.5,
alpha_f=1.)
model.compile(optimizer=keras.optimizers.Adam(lr=learn_rate),
loss=custom_loss,
metrics=['accuracy', precision, recall, fmeasure])
# model.compile(optimizer=keras.optimizers.Adam(lr=learn_rate),
# loss='categorical_crossentropy',
# metrics=['accuracy'])
training_batch_generator = CNVDataGenerator3(target_train_h5_fn,
train_len,
batch,
win_size=n_win_size,
n_feat=n_feat,
smooth_factor=lbl_smt_frac)
val_batch_generator = CNVDataGenerator3(target_val_h5_fn,
val_len,
batch,
win_size=n_win_size,
n_feat=n_feat,
smooth_factor=lbl_smt_frac)
# fit_generator
model.fit_generator(
generator=training_batch_generator,
steps_per_epoch=(train_len // batch),
epochs=epochs,
verbose=1,
# class_weight=None, # class_weight=class_weights
callbacks=callbacks,
validation_data=val_batch_generator,
validation_steps=(val_len // batch),
use_multiprocessing=True, # True
workers=n_cpu, # n_cpu
max_queue_size=(n_cpu + 10)) # 80
def gp_fitness(batch_size, epoch, learn_rate, drop, fc_size, blocks):
batch_size = int(batch_size)
epoch = int(epoch)
learn_rate = float(learn_rate)
drop = float(drop)
fc_size = int(fc_size)
print('batch_size: {}'.format(batch_size))
print('epoch: {}'.format(epoch))
print('learn rate: {0:.3f}'.format(learn_rate))
print('drop ratio: {0:.1f}'.format(drop))
print('fc size: {}'.format(fc_size))
print('blocks: {}'.format(blocks))
_blocks = (int(x) for x in blocks.split('_'))
tmp_out_name = out_name(batch_size, epoch, learn_rate, drop, fc_size,
blocks)
val_acc_arr = []
# for i, (train_idx, val_idx) in enumerate(skf.split(x_train, y_train_labels)):
# ix_train1, ix_val1 = x_train[train_idx], x_train[val_idx]
# iy_train1, iy_val1 = y_train[train_idx], y_train[val_idx]
for i in range(1):
ix_train1, ix_val1, iy_train1, iy_val1 = train_test_split(
x_train, y_train, test_size=0.2, random_state=123)
nb_trains = ix_train1.shape[0] // batch_size
nb_examples = batch_size * nb_trains
k_x_train = ix_train1[:nb_examples]
k_y_train = iy_train1[:nb_examples]
k_x_val = np.concatenate((ix_val1, ix_train1[nb_examples:]),
axis=0)
k_y_val = np.concatenate((iy_val1, iy_train1[nb_examples:]),
axis=0)
del ix_train1, ix_val1, iy_train1, iy_val1
# gc.collect()
model_fn = os.path.join(_model_dir,
'{0}-k{1}.hdf5'.format(tmp_out_name, i))
tensorboard_fn = os.path.join(
_tb_dir, '{0}-tb_k{1}'.format(tmp_out_name, i))
csvlogger_fn = os.path.join(
_csvlogger_dir, '{0}-csvlogger_k{1}'.format(tmp_out_name, i))
base_model = cnv_net(n_win_size,
n_feat,
n_class,
filters=32,
kernel_size=16,
strides=1,
pool_size=2,
pool_stride=2,
drop=drop,
blocks=_blocks,
fc_size=fc_size,
kernel_regular_l2=None,
m_name=tmp_out_name)
if n_gpu > 1:
model = multi_gpu_model(base_model, n_gpu)
else:
model = base_model
callbacks = [
# Early stopping definition
EarlyStopping(monitor='val_acc', patience=5, verbose=1),
# Decrease learning rate
AdvancedLearnignRateScheduler(monitor='val_acc',
patience=1,
verbose=1,
mode='auto',
decayRatio=0.5),
# Saving best model
# MultiGPUCheckpointCallback(model_fn, base_model=base_model, monitor='val_acc',
# save_best_only=True, verbose=1, save_weights_only=True),
# TensorBoard(tensorboard_fn, batch_size=batch_size, histogram_freq=2),
CSVLogger(csvlogger_fn)
]
model.compile(optimizer=keras.optimizers.Adam(lr=learn_rate),
loss='categorical_crossentropy',
metrics=['accuracy'])
hist = model.fit(k_x_train,
k_y_train,
validation_data=(k_x_val, k_y_val),
epochs=epoch,
batch_size=batch_size,
callbacks=callbacks)
i_val_acc = hist.history['val_acc'][-1]
print("Accuracy: {0:.6%}".format(i_val_acc))
val_acc_arr.append(i_val_acc)
del model
del k_x_train, k_y_train, k_x_val, k_y_val
K.clear_session()
gc.collect()
i_config = tf.ConfigProto()
i_config.gpu_options.allow_growth = True
# i_config = tf.ConfigProto(device_count={'GPU': n_gpu, 'CPU': n_cpu})
i_sess = tf.Session(config=i_config)
K.set_session(i_sess)
cv_mean_val_acc = np.mean(val_acc_arr)
global best_accuracy
if cv_mean_val_acc > best_accuracy:
best_accuracy = cv_mean_val_acc
return -cv_mean_val_acc
def gp_fitness(batch_size, epoch, learn_rate, learn_rate_decay, filters,
drop, fc_size, blocks):
print('batch_size: {}'.format(batch_size))
print('epoch: {}'.format(epoch))
print('learn rate: {0:.3f}'.format(learn_rate))
print('learn rate decay: {0:.1f}'.format(learn_rate_decay))
print('filters: {}'.format(filters))
print('drop ratio: {0:.1f}'.format(drop))
print('fc size: {}'.format(fc_size))
print('blocks: {}'.format(blocks))
tmp_out_name = out_name(batch_size, epoch, learn_rate,
learn_rate_decay, filters, drop, fc_size,
blocks)
val_acc_arr = []
# for i, (train_idx, val_idx) in enumerate(skf.split(x_train, y_train_labels)):
# ix_train1, ix_val1 = x_train[train_idx], x_train[val_idx]
# iy_train1, iy_val1 = y_train[train_idx], y_train[val_idx]
for i in range(1):
ix_train1, ix_val1, iy_train1, iy_val1 = train_test_split(
x_train, y_train, test_size=0.2, shuffle=False)
nb_trains = ix_train1.shape[0] // batch_size
nb_examples = batch_size * nb_trains
k_x_train = ix_train1[:nb_examples]
k_y_train = iy_train1[:nb_examples]
k_x_val = np.concatenate((ix_val1, ix_train1[nb_examples:]),
axis=0)
k_y_val = np.concatenate((iy_val1, iy_train1[nb_examples:]),
axis=0)
del ix_train1, ix_val1, iy_train1, iy_val1
# gc.collect()
model_fn = os.path.join(_model_dir,
'{0}-k{1}.hdf5'.format(tmp_out_name, i))
tensorboard_fn = os.path.join(
_tb_dir, '{0}-tb_k{1}'.format(tmp_out_name, i))
csvlogger_fn = os.path.join(
_csvlogger_dir, '{0}-csvlogger_k{1}'.format(tmp_out_name, i))
model = cnv_net(n_win_size,
n_feat,
n_class,
filters=filters,
kernel_size=16,
strides=1,
pool_size=2,
pool_stride=2,
drop=drop,
blocks=blocks,
fc_size=fc_size,
m_name=tmp_out_name)
callbacks = [
# Horovod: broadcast initial variable states from rank 0 to all other processes.
# This is necessary to ensure consistent initialization of all workers when
# training is started with random weights or restored from a checkpoint.
hvd.callbacks.BroadcastGlobalVariablesCallback(0),
# # Horovod: average metrics among workers at the end of every epoch.
# #
# # Note: This callback must be in the list before the ReduceLROnPlateau,
# # TensorBoard, or other metrics-based callbacks.
# hvd.callbacks.MetricAverageCallback(),
#
# # Horovod: using `lr = 1.0 * hvd.size()` from the very beginning leads to worse final
# # accuracy. Scale the learning rate `lr = 1.0` ---> `lr = 1.0 * hvd.size()` during
# # the first five epochs. See https://arxiv.org/abs/1706.02677 for details.
# hvd.callbacks.LearningRateWarmupCallback(warmup_epochs=5, verbose=verbose),
#
# # Horovod: after the warmup reduce learning rate by 10 on the 30th, 60th and 80th epochs.
# hvd.callbacks.LearningRateScheduleCallback(start_epoch=5, end_epoch=30, multiplier=1.),
# hvd.callbacks.LearningRateScheduleCallback(start_epoch=30, end_epoch=60, multiplier=1e-1),
# hvd.callbacks.LearningRateScheduleCallback(start_epoch=60, end_epoch=80, multiplier=1e-2),
# hvd.callbacks.LearningRateScheduleCallback(start_epoch=80, multiplier=1e-3),
]
# Horovod: save checkpoints only on the first worker to prevent other workers from corrupting them.
if hvd.rank() == 0:
callbacks.append(
EarlyStopping(monitor='val_acc', patience=5, verbose=1))
callbacks.append(
AdvancedLearnignRateScheduler(monitor='val_acc',
patience=1,
verbose=1,
mode='auto',
decayRatio=learn_rate_decay))
callbacks.append(
MultiGPUCheckpointCallback(model_fn,
base_model=model,
monitor='val_acc',
save_best_only=True,
verbose=1,
save_weights_only=True))
callbacks.append(
TensorBoard(tensorboard_fn,
batch_size=batch_size,
histogram_freq=2))
callbacks.append(CSVLogger(csvlogger_fn))
# Horovod: adjust learning rate based on number of GPUs.
opt = keras.optimizers.Adam(lr=learn_rate)
# Horovod: add Horovod Distributed Optimizer.
opt = hvd.DistributedOptimizer(opt)
model.compile(optimizer=opt,
loss='categorical_crossentropy',
metrics=['accuracy'])
hist = model.fit(k_x_train,
k_y_train,
validation_data=(k_x_val, k_y_val),
verbose=verbose,
epochs=epoch,
batch_size=batch_size,
callbacks=callbacks)
i_val_acc = hist.history['val_acc'][-1]
print("Accuracy: {0:.6%}".format(i_val_acc))
val_acc_arr.append(i_val_acc)
del model
del k_x_train, k_y_train, k_x_val, k_y_val
K.clear_session()
gc.collect()
i_config = tf.ConfigProto()
i_config.gpu_options.allow_growth = True
i_config.gpu_options.visible_device_list = str(hvd.local_rank())
i_sess = tf.Session(config=i_config)
K.set_session(i_sess)
cv_mean_val_acc = np.mean(val_acc_arr)
global best_accuracy
if cv_mean_val_acc > best_accuracy:
best_accuracy = cv_mean_val_acc
return -cv_mean_val_acc
def main(args):
sample_id = args.sample_id
in_bam_fn = args.in_bam_fn
min_ratio = args.min_ratio
win_size = args.win_size
chr_id = args.chr_id
ref_fa_f = args.ref_fa_f
ref_map_f = args.ref_map_f
step_size = args.step_size
model_weight_fn = args.model_weight_fn
out_dir = args.out_dir
n_features = args.n_features
n_classes = args.n_classes
model_weight_name = os.path.splitext(os.path.basename(model_weight_fn))[0]
model_in_lst = model_weight_name.split('-')
model_name = model_in_lst[1]
model_params_lst = re.findall(r"[-+]?\d*\.\d+|\d+", model_in_lst[0])
logging.info(
'model name: {0}, model params(batch, epoch, lr, drop, fc, block, win): {1}'
.format(model_name, model_params_lst))
assert len(model_params_lst) >= 6
drop = float(model_params_lst[3])
fc_size = int(model_params_lst[4])
blocks = (int(x) for x in model_params_lst[5])
model = None
if model_name == 'cnvnet':
model = cnv_net(win_size,
n_features,
n_classes,
drop=drop,
blocks=blocks,
fc_size=fc_size)
model.load_weights(model_weight_fn)
logging.info("finished loading model!")
out_fn = os.path.join(
out_dir, model_weight_name + '_' + sample_id + '.online_cnv_call')
if os.path.exists(out_fn):
os.remove(out_fn)
# generate online features
online_feat_obj = FeatureOnline(ref_fa_f, ref_map_f)
online_feat_obj.load_bam(in_bam_fn)
def online_call(tmp_online_feats, tmp_chr_id):
for i, res in enumerate(tmp_online_feats):
reg_start, reg_end, reg_len, out_indicator, f_mat = res
if out_indicator == 3:
# normalization
i_x_max = np.max(f_mat, axis=-1)
i_x_max[i_x_max == 0] = 1
f_mat = f_mat * 1.0 / i_x_max.reshape(n_features, 1)
f_mat = np.transpose(f_mat)
y_prob = model.predict(np.array([f_mat]),
batch_size=1)[0] # batch_size=1?
ypred_prob = ','.join(['{:.6f}'.format(x) for x in y_prob])
ypred = y_prob.argmax(axis=-1)
with open(out_fn, 'a') as f:
f.write('{}\t{}\t{}\t{}\t{}\t{}\t{}\n'.format(
tmp_chr_id, reg_start, reg_end, reg_len, out_indicator,
ypred_prob, ypred))
else:
# save to the result out put
with open(out_fn, 'a') as f:
f.write('{}\t{}\t{}\t{}\t{}\t{}\t{}\n'.format(
tmp_chr_id, reg_start, reg_end, reg_len, out_indicator,
None, None))
del tmp_online_feats
return 'chromosome {} cnv call done!'.format(tmp_chr_id)
logging.info('begining calling cnvs for chromosome: {}'.format(chr_id))
if chr_id.upper() == 'A': # all chromosomes
chr_lst_idx = [str(i) for i in range(1, 23)] # + ['X']
for i_chr_id in chr_lst_idx:
online_feats = online_feat_obj.run(sample_id,
i_chr_id,
win_size=win_size,
min_r=min_ratio,
stride_size=step_size)
logging.info(online_call(online_feats, i_chr_id))
else:
online_feats = online_feat_obj.run(sample_id,
chr_id,
win_size=win_size,
min_r=min_ratio,
stride_size=step_size)
logging.info(online_call(online_feats, chr_id))
logging.info('Sample {} cnv call completed, output: {}'.format(
sample_id, out_fn))