def evaluate(self):
iterator = self._iterators['main']
target = self._targets['main']
if hasattr(iterator, 'reset'):
iterator.reset()
it = iterator
else:
it = copy.copy(iterator)
in_values, out_values, rest_values = apply_to_iterator(
self.predict_func, it)
# delete unused iterators explicitly
del in_values
pred_labels, pred_scores = out_values
gt_labels, = rest_values
result = eval_multi_label_classification(
pred_labels, pred_scores, gt_labels)
report = {'map': result['map']}
if self.label_names is not None:
for l, label_name in enumerate(self.label_names):
try:
report['ap/{:s}'.format(label_name)] = result['ap'][l]
except IndexError:
report['ap/{:s}'.format(label_name)] = np.nan
observation = {}
with reporter.report_scope(observation):
reporter.report(report, target)
return observation
def __call__(self, trainer):
"""override method of extensions.Evaluator."""
# set up a reporter
reporter = reporter_module.Reporter()
if hasattr(self, 'name'):
prefix = self.name + '/'
else:
prefix = ''
for name, target in six.iteritems(self._targets):
reporter.add_observer(prefix + name, target)
reporter.add_observers(prefix + name,
target.namedlinks(skipself=True))
with reporter:
self.patch_image_dir = os.path.join(trainer.out, self.layer_name)
if not os.path.exists(self.patch_image_dir):
os.makedirs(self.patch_image_dir)
result, locs, bounds = self.evaluate()
outputdir = os.path.join(trainer.out, 'features')
if not os.path.exists(outputdir):
os.makedirs(outputdir)
#print(bounds)
#self.savetxt(os.path.join(trainer.out, self.layer_name + '.txt'),
# features, delimiter='\t')
#cupy.savez(os.path.join(trainer.out, self.layer_name + '.npz'),
# **{self.layer_name: features})
if locs:
self.save_tuple_list(os.path.join(outputdir,
'maxloc_' + self.layer_name + '.txt'), locs)
if bounds:
self.save_tuple_list(os.path.join(outputdir,
'maxbounds_' + self.layer_name + '.txt'), bounds)
reporter_module.report(result)
return result
def evaluate(self):
bt = time.time()
with chainer.no_backprop_mode():
references = []
hypotheses = []
observation = {}
with reporter.report_scope(observation):
for i in range(0, len(self.test_data), self.batch):
src, trg = zip(*self.test_data[i:i + self.batch])
references.extend([[t.tolist()] for t in trg])
src = [chainer.dataset.to_device(self.device, x)
for x in src]
if self.comm.rank == 0:
self.model.translate(src, self.max_length)
elif self.comm.rank == 1:
ys = [y.tolist()
for y in self.model.translate(
src, self.max_length)]
hypotheses.extend(ys)
if self.comm.rank == 1:
bleu = bleu_score.corpus_bleu(
references, hypotheses, smoothing_function=bleu_score.
SmoothingFunction().method1)
reporter.report({'bleu': bleu}, self.model)
et = time.time()
if self.comm.rank == 1:
print("BleuEvaluator(single)::evaluate(): "
"took {:.3f} [s]".format(et - bt))
sys.stdout.flush()
return observation
def __call__(self, trainer=None):
"""Executes the evaluator extension.
Unlike usual extensions, this extension can be executed without passing
a trainer object. This extension reports the performance on validation
dataset using the :func:`~chainer.report` function. Thus, users can use
this extension independently from any trainer by manutally configuring
a :class:`~chainer.Reporter` object.
Args:
trainer (~chainer.training.Trainer): Trainer object that invokes
this extension. It can be omitted in case of calling this
extension manually.
Returns:
dict: Result dictionary that contains mean statistics of values
reported by the evaluation function.
"""
# set up a reporter
reporter = reporter_module.Reporter()
if hasattr(self, 'name'):
prefix = self.name + '/'
else:
prefix = ''
for name, target in six.iteritems(self._targets):
reporter.add_observer(prefix + name, target)
reporter.add_observers(prefix + name,
target.namedlinks(skipself=True))
with reporter:
result = self.evaluate()
reporter_module.report(result)
return result
def __call__(self, *inputs):
xs = inputs[:len(inputs) // 2]
ys = inputs[len(inputs) // 2:]
xs = [x[::-1] for x in xs]
batch = len(xs)
eos = self.xp.zeros(1, self.xp.int32)
ys_in = [F.concat([eos, y], axis=0) for y in ys]
ys_out = [F.concat([y, eos], axis=0) for y in ys]
eys = sequence_embed(self.embed_y, ys_in)
# Receive hidden states from encoder process and decode.
_, _, os, _ = self.mn_decoder(eys)
# It is faster to concatenate data before calculating loss
# because only one matrix multiplication is called.
concat_os = F.concat(os, axis=0)
concat_ys_out = F.concat(ys_out, axis=0)
loss = F.sum(F.softmax_cross_entropy(
self.W(concat_os), concat_ys_out, reduce='no')) / batch
reporter.report({'loss': loss.data}, self)
n_words = concat_ys_out.shape[0]
perp = self.xp.exp(loss.data * batch / n_words)
reporter.report({'perp': perp}, self)
return loss
def __call__(self, *inputs):
xs = inputs[:len(inputs) // 2]
ys = inputs[len(inputs) // 2:]
xs = [x[::-1] for x in xs]
eos = self.xp.zeros(1, self.xp.int32)
ys_in = [F.concat([eos, y], axis=0) for y in ys]
ys_out = [F.concat([y, eos], axis=0) for y in ys]
# Both xs and ys_in are lists of arrays.
exs = sequence_embed(self.embed_x, xs)
eys = sequence_embed(self.embed_y, ys_in)
batch = len(xs)
# None represents a zero vector in an encoder.
hx, cx, _ = self.encoder(None, None, exs)
_, _, os = self.decoder(hx, cx, eys)
# It is faster to concatenate data before calculating loss
# because only one matrix multiplication is called.
concat_os = F.concat(os, axis=0)
concat_ys_out = F.concat(ys_out, axis=0)
loss = F.sum(F.softmax_cross_entropy(
self.W(concat_os), concat_ys_out, reduce='no')) / batch
reporter.report({'loss': loss.data}, self)
n_words = concat_ys_out.shape[0]
perp = self.xp.exp(loss.data * batch / n_words)
reporter.report({'perp': perp}, self)
return loss
def __call__(self, x, t):
h1 = F.relu(self.l1(x))
y = self.l2(h1)
loss = F.mean_squared_error(y, t)
reporter.report({'loss': loss}, self)
pred_list.append(y.data[0])
return loss
def evaluate(self):
iterator = self._iterators['main']
target = self._targets['main']
if hasattr(iterator, 'reset'):
iterator.reset()
it = iterator
else:
it = copy.copy(iterator)
in_values, out_values, rest_values = apply_to_iterator(
target.predict, it)
# delete unused iterators explicitly
del in_values
points, labels, scores = out_values
gt_points, gt_labels = rest_values
result = eval_projected_3d_bbox_single(
points, scores, gt_points,
self.vertex, self.intrinsics, diam=self.diam)
report = result
observation = {}
with reporter.report_scope(observation):
reporter.report(report, target)
return observation
def __call__(self, *args):
"""Computes the loss value for an input and label pair.
It also computes accuracy and stores it to the attribute.
Args:
args (list of ~chainer.Variable): Input minibatch.
The all elements of ``args`` but last one are features and
the last element corresponds to ground truth labels.
It feeds features to the predictor and compare the result
with ground truth labels.
Returns:
~chainer.Variable: Loss value.
"""
assert len(args) >= 2
x = args[:-1]
t = args[-1]
self.y = None
self.loss = None
self.accuracy = None
self.y = self.predictor(*x)
self.loss = self.lossfun(self.y, t)
reporter.report({'loss': self.loss}, self)
if self.compute_accuracy:
self.accuracy = self.accfun(self.y, t)
reporter.report({'accuracy': self.accuracy}, self)
return self.loss
def __call__(self, x, t):
y = self.predictor(x)
loss = self.lossfun(y, t)
reporter.report({'loss': loss}, self)
if self.accfun is not None:
accuracy = self.accfun(y, t)
reporter.report({'accuracy': accuracy}, self)
return loss
def __call__(self, x, context):
e = self.embed(context)
shape = e.data.shape
x = F.broadcast_to(x[:, None], (shape[0], shape[1]))
e = F.reshape(e, (shape[0] * shape[1], shape[2]))
x = F.reshape(x, (shape[0] * shape[1],))
loss = self.loss_func(e, x)
reporter.report({'loss': loss}, self)
return loss
def __call__(self, *args):
x, t, ignore = args[:3]
self.y = None
self.loss = None
self.pre_rec = None
self.y = self.predictor(x)
self.loss = self.lossfun(self.y, t, ignore)
reporter.report({'loss': self.loss}, self)
return self.loss
def __call__(self, x, contexts):
e = self.embed(contexts)
batch_size, n_context, n_units = e.shape
x = F.broadcast_to(x[:, None], (batch_size, n_context))
e = F.reshape(e, (batch_size * n_context, n_units))
x = F.reshape(x, (batch_size * n_context,))
loss = self.loss_func(e, x)
reporter.report({'loss': loss}, self)
return loss
def forward(self, xs, ys):
concat_outputs = self.predict(xs)
concat_truths = F.concat(ys, axis=0)
loss = F.softmax_cross_entropy(concat_outputs, concat_truths)
accuracy = F.accuracy(concat_outputs, concat_truths)
reporter.report({'loss': loss.data}, self)
reporter.report({'accuracy': accuracy.data}, self)
return loss
def forward(self, *args, **kwargs):
"""Computes the loss value for an input and label pair.
It also computes accuracy and stores it to the attribute.
Args:
args (list of ~chainer.Variable): Input minibatch.
kwargs (dict of ~chainer.Variable): Input minibatch.
When ``label_key`` is ``int``, the correpoding element in ``args``
is treated as ground truth labels. And when it is ``str``, the
element in ``kwargs`` is used.
The all elements of ``args`` and ``kwargs`` except the ground trush
labels are features.
It feeds features to the predictor and compare the result
with ground truth labels.
.. note::
We set ``None`` to the attributes ``y``, ``loss`` and ``accuracy``
each time before running the predictor, to avoid unnecessary memory
consumption. Note that the variables set on those attributes hold
the whole computation graph when they are computed. The graph
stores interim values on memory required for back-propagation.
We need to clear the attributes to free those values.
Returns:
~chainer.Variable: Loss value.
"""
if isinstance(self.label_key, int):
if not (-len(args) <= self.label_key < len(args)):
msg = 'Label key %d is out of bounds' % self.label_key
raise ValueError(msg)
t = args[self.label_key]
if self.label_key == -1:
args = args[:-1]
else:
args = args[:self.label_key] + args[self.label_key + 1:]
elif isinstance(self.label_key, str):
if self.label_key not in kwargs:
msg = 'Label key "%s" is not found' % self.label_key
raise ValueError(msg)
t = kwargs[self.label_key]
del kwargs[self.label_key]
self.y = None
self.loss = None
self.accuracy = None
self.y = self.predictor(*args, **kwargs)
self.loss = self.lossfun(self.y, t)
reporter.report({'loss': self.loss}, self)
if self.compute_accuracy:
self.accuracy = self.accfun(self.y, t)
reporter.report({'accuracy': self.accuracy}, self)
return self.loss
def __call__(self, x, context):
e = self.embed(context)
shape = e.shape
x = F.broadcast_to(x[:, None], (shape[0], shape[1]))
e = F.reshape(e, (shape[0] * shape[1], shape[2]))
x = F.reshape(x, (shape[0] * shape[1],))
loss = self.loss_func(e, x)
# shouldn't we divide loss by batch size?
reporter.report({'loss': loss}, self)
return loss
def __call__(self, x, context):
x = F.broadcast_to(x[:, None], (context.shape[0], context.shape[1]))
x = F.reshape(x, (context.shape[0] * context.shape[1],))
context = context.reshape((context.shape[0] * context.shape[1]))
e = self.rnn.charRNN(context)
loss = self.loss_func(e, x)
reporter.report({'loss': loss}, self)
return loss
def __call__(self, trainer):
"""Execute the statistics extension.
Collect statistics for the current state of parameters.
Note that this method will merely update its statistic summary, unless
the internal trigger is fired. If the trigger is fired, the summary
will also be reported and then reset for the next accumulation.
Args:
trainer (~chainer.training.Trainer): Associated trainer that
invoked this extension.
"""
statistics = {}
for link in self._links:
link_name = getattr(link, 'name', 'None')
for param_name, param in link.namedparams():
for attr_name in self._attrs:
for function_name, function in \
six.iteritems(self._statistics):
# Get parameters as a flattened one-dimensional array
# since the statistics function should make no
# assumption about the axes
params = getattr(param, attr_name).ravel()
if (self._skip_nan_params
and (
backend.get_array_module(params).isnan(params)
.any())):
value = numpy.nan
else:
value = function(params)
key = self.report_key_template.format(
prefix=self._prefix + '/' if self._prefix else '',
link_name=link_name,
param_name=param_name,
attr_name=attr_name,
function_name=function_name
)
if (isinstance(value, chainer.get_array_types())
and value.size > 1):
# Append integer indices to the keys if the
# statistic function return multiple values
statistics.update({'{}/{}'.format(key, i): v for
i, v in enumerate(value)})
else:
statistics[key] = value
self._summary.add(statistics)
if self._trigger(trainer):
reporter.report(self._summary.compute_mean())
self._summary = reporter.DictSummary() # Clear summary
def __call__(self, x, context):
context_shape = context.shape
context = context.reshape((context.shape[0] * context.shape[1]))
e = self.rnn.charRNN(context)
e = F.reshape(e, (context_shape[0], context_shape[1], e.shape[1]))
h = F.sum(e, axis=1) * (1. / context_shape[1])
loss = self.loss_func(h, x)
reporter.report({'loss': loss}, self)
return loss
def __call__(self, trainer):
observation = trainer.observation
if not (self._numerator_key in observation and
self._denominator_key in observation):
return
self._numerator += observation[self._numerator_key]
self._denominator += observation[self._denominator_key]
if self._trigger(trainer):
result = float(self._numerator) / self._denominator
self._numerator = 0
self._denominator = 0
reporter.report({self._result_key: result})
def predict(self, xs):
# Encoding
logits, exs = self._encode(xs)
# Discretization
D = F.gumbel_softmax(logits, self.tau, axis=2)
gumbel_output = D.reshape(-1, self.M * self.K)
with chainer.no_backprop_mode():
maxp = F.mean(F.max(D, axis=2))
reporter.report({'maxp': maxp.data}, self)
# Decoding
y_hat = self._decode(gumbel_output)
return y_hat, exs
def __call__(self, *args, **kwargs):
"""Computes the loss value for an input and label pair.
It also computes accuracy and stores it to the attribute.
Args:
args (list of ~chainer.Variable): Input minibatch.
kwargs (dict of ~chainer.Variable): Input minibatch.
When ``label_key`` is ``int``, the correpoding element in ``args``
is treated as ground truth labels. And when it is ``str``, the
element in ``kwargs`` is used.
The all elements of ``args`` and ``kwargs`` except the ground trush
labels are features.
It feeds features to the predictor and compare the result
with ground truth labels.
Returns:
~chainer.Variable: Loss value.
"""
if isinstance(self.label_key, int):
if not (-len(args) <= self.label_key < len(args)):
msg = 'Label key %d is out of bounds' % self.label_key
raise ValueError(msg)
t = args[self.label_key]
if self.label_key == -1:
args = args[:-1]
else:
args = args[:self.label_key] + args[self.label_key + 1:]
elif isinstance(self.label_key, str):
if self.label_key not in kwargs:
msg = 'Label key "%s" is not found' % self.label_key
raise ValueError(msg)
t = kwargs[self.label_key]
del kwargs[self.label_key]
self.y = None
self.loss = None
self.accuracy = None
self.y = self.predictor(*args, **kwargs)
self.loss = self.lossfun(self.y, t)
reporter.report({'loss': self.loss}, self)
if self.compute_accuracy:
self.accuracy = self.accfun(self.y, t)
reporter.report({'accuracy': self.accuracy}, self)
return self.loss
def __call__(self, x, context):
x = F.broadcast_to(x[:, None], (context.shape[0], context.shape[1]))
x = F.reshape(x, (context.shape[0] * context.shape[1],))
if args.subword == 'rnn':
context = context.reshape((context.shape[0] * context.shape[1]))
e = self.rnn.charRNN(context)
if args.subword == 'none':
e = self.embed(context)
e = F.reshape(e, (e.shape[0] * e.shape[1], e.shape[2]))
loss = self.loss_func(e, x)
reporter.report({'loss': loss}, self)
return loss
def __call__(self, trainer):
with chainer.no_backprop_mode():
references = []
hypotheses = []
for i in range(0, len(self.test_data), self.batch):
sources, targets = zip(*self.test_data[i:i + self.batch])
references.extend([[t.tolist()] for t in targets])
sources = [
chainer.dataset.to_device(self.device, x) for x in sources]
ys = [y.tolist()
for y in self.model.translate(sources, self.max_length)]
hypotheses.extend(ys)
bleu = bleu_score.corpus_bleu(
references, hypotheses,
smoothing_function=bleu_score.SmoothingFunction().method1)
reporter.report({self.key: bleu})
def __call__(self, x, t):
"""Computes the loss value for an image and label pair.
Args:
x (~chainer.Variable): A variable with a batch of images.
t (~chainer.Variable): A variable with the ground truth
image-wise label.
Returns:
~chainer.Variable: Loss value.
"""
self.y = self.predictor(x)
self.loss = F.softmax_cross_entropy(
self.y, t, class_weight=self.class_weight,
ignore_label=self.ignore_label)
reporter.report({'loss': self.loss}, self)
return self.loss
def evaluate(self):
iterator = self._iterators['main']
target = self._targets['main']
if hasattr(iterator, 'reset'):
iterator.reset()
it = iterator
else:
it = copy.copy(iterator)
in_values, out_values, rest_values = apply_to_iterator(
target.predict, it)
# delete unused iterators explicitly
del in_values
pred_bboxes, pred_labels, pred_scores = out_values
if len(rest_values) == 3:
gt_bboxes, gt_labels, gt_difficults = rest_values
elif len(rest_values) == 2:
gt_bboxes, gt_labels = rest_values
gt_difficults = None
result = eval_detection_voc(
pred_bboxes, pred_labels, pred_scores,
gt_bboxes, gt_labels, gt_difficults,
use_07_metric=self.use_07_metric)
report = {'map': result['map']}
if self.label_names is not None:
for l, label_name in enumerate(self.label_names):
try:
report['ap/{:s}'.format(label_name)] = result['ap'][l]
except IndexError:
report['ap/{:s}'.format(label_name)] = np.nan
observation = {}
with reporter.report_scope(observation):
reporter.report(report, target)
return observation
def __call__(self, xs, ys):
# Before making a transpose, you need to sort two lists in descending
# order of length.
inds = numpy.argsort([-len(x) for x in xs]).astype('i')
xs = [xs[i] for i in inds]
ys = [ys[i] for i in inds]
# Make transposed sequences.
# Now xs[t] is a batch of words at time t.
xs = F.transpose_sequence(xs)
ys = F.transpose_sequence(ys)
# h[i] is feature vector for each batch of words.
hs = [self.feature(x) for x in xs]
loss = self.crf(hs, ys)
reporter.report({'loss': loss.data}, self)
# To predict labels, call argmax method.
_, predict = self.crf.argmax(hs)
correct = 0
total = 0
for y, p in six.moves.zip(ys, predict):
correct += self.xp.sum(y.data == p)
total += len(y.data)
reporter.report({'correct': correct}, self)
reporter.report({'total': total}, self)
return loss
def forward(self, imgs, captions):
"""Batch of images to a single loss."""
imgs = Variable(imgs)
if self.finetune_feat_extractor:
img_feats = self.feat_extractor(imgs)
else:
# Extract features with the `train` configuration set to `False` in
# order to basically skip the dropout regularizations. This is how
# dropout is used during standard inference. Also, since we are not
# going to optimize the feature extractor, we explicitly set the
# backpropgation mode to not construct any computational graphs.
with chainer.using_config('train', False), \
chainer.no_backprop_mode():
img_feats = self.feat_extractor(imgs)
loss = self.lang_model(img_feats, captions)
# Report the loss so that it can be printed, logged and plotted by
# other trainer extensions
reporter.report({'loss': loss}, self)
return loss
def __call__(self, trainer):
"""override method of extensions.Evaluator."""
# set up a reporter
reporter = reporter_module.Reporter()
if hasattr(self, 'name'):
prefix = self.name + '/'
else:
prefix = ''
for name, target in six.iteritems(self._targets):
reporter.add_observer(prefix + name, target)
reporter.add_observers(prefix + name,
target.namedlinks(skipself=True))
with reporter:
result, predictions, rankings = self.evaluate()
#print(result)
#print(predictions)
self.save_predictions(os.path.join(trainer.out, 'pred.txt'), predictions)
self.save_predictions(os.path.join(trainer.out, 'ranking.txt'), rankings)
reporter_module.report(result)
return result
def __call__(self, trainer):
"""override method of extensions.Evaluator."""
# set up a reporter
reporter = reporter_module.Reporter()
if hasattr(self, 'name'):
prefix = self.name + '/'
else:
prefix = ''
for name, target in six.iteritems(self._targets):
reporter.add_observer(prefix + name, target)
reporter.add_observers(prefix + name,
target.namedlinks(skipself=True))
with reporter:
result, features = self.evaluate()
outputdir = os.path.join(trainer.out, 'features')
if not os.path.exists(outputdir):
os.makedirs(outputdir)
#ioutil.savetxt(os.path.join(trainer.out, self.layer_name + '.txt'),
# features, delimiter='\t')
#cupy.savez(os.path.join(trainer.out, self.layer_name + '.npz'),
# **{self.layer_name: features})
if self.save_features:
xp = cuda.get_array_module(features)
xp.save(os.path.join(outputdir, self.layer_name + '.npy'),
features)
if self.top is not None:
top_N_args = Vutil.get_argmax_N(features, self.top)
#print(top_N_args)
ioutil.savetxt(os.path.join(outputdir,
'top_' + self.layer_name + '.txt'), top_N_args,
fmt='%d', delimiter='\t')
#np.savez(os.path.join(trainer.out,
# 'top_' + self.layer_name + '.npz'),
# **{self.layer_name: top_N_args})
reporter_module.report(result)
return result
def calc_score(self, df_truth, pred):
target_types = list(set(df_truth['type']))
diff = df_truth['scalar_coupling_constant'] - pred
scores = 0
metrics = {}
for target_type in target_types:
target_pair = df_truth['type'] == target_type
score_exp = np.mean(np.abs(diff[target_pair]))
scores += np.log(score_exp)
metrics[target_type] = np.log(score_exp)
metrics['ALL_LogMAE'] = scores / len(target_types)
observation = {}
with reporter.report_scope(observation):
reporter.report(metrics, self._targets['main'])
return observation
def forward(self, **indata):
imgs = indata['image']
y = self.center_detector(imgs)
loss, hm_loss, wh_loss, offset_loss, detail_losses = center_detection_loss(
y,
indata,
self.hm_weight,
self.wh_weight,
self.offset_weight,
comm=self.comm)
hm = y[-1]["hm"]
hm_mae = F.mean_absolute_error(hm, indata["hm"])
reporter.report(
{
'loss': loss,
'hm_loss': hm_loss,
'hm_pos_loss': detail_losses['hm_pos_loss'],
'hm_neg_loss': detail_losses['hm_neg_loss'],
'hm_mae': hm_mae,
'wh_loss': wh_loss,
'offset_loss': offset_loss
}, self)
return loss
def __call__(self, trainer):
with chainer.no_backprop_mode():
references = []
hypotheses = []
for i in range(0, len(self.test_data[0:100]), self.batch):
sources, targets = zip(*self.test_data[i:i + self.batch])
references.extend([[t[0].tolist()] for t in targets])
sources = [
chainer.dataset.to_device(self.device, x) for x in sources
]
ys = self.model.translate(sources, self.max_length)
ys = [y.tolist() for y in ys]
hypotheses.extend(ys)
source, target = zip(*self.test_data[0:100])
loss = self.model.CalculateValLoss(source, target)
bleu = bleu_score.corpus_bleu(
references,
hypotheses,
smoothing_function=bleu_score.SmoothingFunction().method1)
reporter.report({self.key[0]: bleu})
reporter.report({self.key[1]: loss})
def __call__(self, x, labels):
x = BatchTransform(self.model.mean)(x)
x = self.xp.array(x)
scores = self.model(x)
B, n_class = scores.shape[:2]
one_hot_labels = self.xp.zeros((B, n_class), dtype=np.int32)
for i, label in enumerate(labels):
one_hot_labels[i, label] = 1
# sigmoid_cross_entropy normalizes the loss
# by the size of batch and the number of classes.
# It works better to remove the normalization factor
# of the number of classes.
loss = self.loss_scale * F.sigmoid_cross_entropy(
scores, one_hot_labels)
result = calc_prec_and_recall(scores, labels)
reporter.report({'loss': loss}, self)
reporter.report({'recall': result['recall']}, self)
reporter.report({'precision': result['precision']}, self)
reporter.report({'n_pred': result['n_pred']}, self)
reporter.report({'n_pos': result['n_pos']}, self)
return loss
def __call__(self, x):
chainer.global_config.dtype = numpy.float64
q_z = self.encoder(x)
z = q_z.sample(self.k)
p_x = self.decoder(z, n_batch_axes=2)
p_z = self.prior()
reconstr = F.mean(
p_x.log_prob(F.broadcast_to(x[None, :], (self.k, ) + x.shape)))
kl_penalty = F.mean(q_z.log_prob(z) - p_z.log_prob(z))
loss = -(reconstr - self.beta * kl_penalty)
reporter.report({'loss': loss}, self)
reporter.report({'reconstr': reconstr}, self)
reporter.report({'kl_penalty': kl_penalty}, self)
reporter.report({'beta': self.beta}, self)
return loss
def forward(self, x, t):
xp = cuda.get_array_module(x)
y = self.predictor(x)
log_softmax = F.log_softmax(y)
# SelectItem is not supported by onnx-chainer.
# TODO(hamaji): Support it?
# log_prob = F.select_item(log_softmax, t)
batch_size = chainer.Variable(xp.array(t.size, xp.float32),
name='batch_size')
self.extra_inputs = [batch_size]
# TODO(hamaji): Currently, F.sum with axis=1 cannot be
# backpropped properly.
# log_prob = F.sum(log_softmax * t, axis=1)
# return -F.sum(log_prob, axis=0) / self.batch_size
log_prob = F.sum(log_softmax * t, axis=(0, 1))
loss = -log_prob / batch_size
reporter.report({'loss': loss}, self)
if self.compute_accuracy:
acc = accuracy.accuracy(y, xp.argmax(t, axis=1))
reporter.report({'accuracy': acc}, self)
loss.name = 'loss'
return loss
def __call__(self, x, t):
self.y = self.predictor(x)
if chainer.config.train:
self.aux_loss = F.softmax_cross_entropy(
self.y[0],
t,
class_weight=self.class_weight,
ignore_label=self.ignore_label)
self.loss = F.softmax_cross_entropy(self.y[1],
t,
class_weight=self.class_weight,
ignore_label=self.ignore_label)
reporter.report({'loss': (self.aux_loss * 0.4) + self.loss}, self)
return (self.aux_loss * 0.4) + self.loss
else:
self.loss = F.softmax_cross_entropy(self.y,
t,
class_weight=self.class_weight,
ignore_label=self.ignore_label)
reporter.report({'loss': self.loss}, self)
return self.loss
def __call__(self, x):
batchsize = x.shape[0]
logw = self.compute_logw(x)
# IWAE = log (1/k) sum_i w_i
logp = F.logsumexp(logw, axis=0) - math.log(self.num_zsamples)
logp_mean = F.sum(logp) / batchsize
obj = -logp_mean
# Variance computation
obj_c = logp - F.broadcast_to(logp_mean, logp.shape)
obj_var = F.sum(obj_c * obj_c) / (batchsize - 1)
obj_elbo = -self.compute_elbo(logw)
reporter.report({
'obj': obj,
'obj_var': obj_var,
'obj_elbo': obj_elbo
}, self)
return obj
def __call__(self, xs, ilens, ys):
"""E2E forward
:param xs:
:param ilens:
:param ys:
:return:
"""
# 1. encoder
hs, ilens = self.enc(xs, ilens)
# 3. CTC loss
if self.mtlalpha == 0:
loss_ctc = None
else:
loss_ctc = self.ctc(hs, ys)
# 4. attention loss
if self.mtlalpha == 1:
loss_att = None
acc = None
else:
loss_att, acc = self.dec(hs, ys)
self.acc = acc
alpha = self.mtlalpha
if alpha == 0:
self.loss = loss_att
elif alpha == 1:
self.loss = loss_ctc
else:
self.loss = alpha * loss_ctc + (1 - alpha) * loss_att
if self.loss.data < CTC_LOSS_THRESHOLD and not math.isnan(
self.loss.data):
reporter.report({'loss_ctc': loss_ctc}, self)
reporter.report({'loss_att': loss_att}, self)
reporter.report({'acc': acc}, self)
logging.info('mtl loss:' + str(self.loss.data))
reporter.report({'loss': self.loss}, self)
else:
logging.warning('loss (=%f) is not correct', self.loss.data)
if self.flag_return:
return self.loss, loss_ctc, loss_att, acc
else:
return self.loss
def forward(self, *inputs):
batch = len(inputs) // 6
lefts = inputs[0:batch]
rights = inputs[batch:batch * 2]
dests = inputs[batch * 2:batch * 3]
labels = inputs[batch * 3:batch * 4]
sequences = inputs[batch * 4:batch * 5]
leaf_labels = inputs[batch * 5:batch * 6]
inds = numpy.argsort([-len(l) for l in lefts])
# Sort all arrays in descending order and transpose them
lefts = F.transpose_sequence([lefts[i] for i in inds])
rights = F.transpose_sequence([rights[i] for i in inds])
dests = F.transpose_sequence([dests[i] for i in inds])
labels = F.transpose_sequence([labels[i] for i in inds])
sequences = F.transpose_sequence([sequences[i] for i in inds])
leaf_labels = F.transpose_sequence([leaf_labels[i] for i in inds])
batch = len(inds)
maxlen = len(sequences)
loss = 0
count = 0
correct = 0
stack = self.xp.zeros((batch, maxlen * 2, self.n_units),
self.xp.float32)
for i, (word, label) in enumerate(zip(sequences, leaf_labels)):
batch = word.shape[0]
es = self.leaf(word)
ds = self.xp.full((batch, ), i, self.xp.int32)
y = self.label(es)
loss += F.softmax_cross_entropy(y, label, normalize=False) * batch
count += batch
predict = self.xp.argmax(y.array, axis=1)
correct += (predict == label.array).sum()
stack = thin_stack.thin_stack_set(stack, ds, es)
for left, right, dest, label in zip(lefts, rights, dests, labels):
l, stack = thin_stack.thin_stack_get(stack, left)
r, stack = thin_stack.thin_stack_get(stack, right)
o = self.node(l, r)
y = self.label(o)
batch = l.shape[0]
loss += F.softmax_cross_entropy(y, label, normalize=False) * batch
count += batch
predict = self.xp.argmax(y.array, axis=1)
correct += (predict == label.array).sum()
stack = thin_stack.thin_stack_set(stack, dest, o)
loss /= count
reporter.report({'loss': loss}, self)
reporter.report({'total': count}, self)
reporter.report({'correct': correct}, self)
return loss
def forward(self, *args, **kwargs):
if isinstance(self.label_key, int):
if not (-len(args) <= self.label_key < len(args)):
msg = 'Label key %d is out of bounds' % self.label_key
raise ValueError(msg)
t = args[self.label_key]
if self.label_key == -1:
args = args[:-1]
else:
args = args[:self.label_key] + args[self.label_key + 1:]
elif isinstance(self.label_key, str):
if self.label_key not in kwargs:
msg = 'Label key "%s" is not found' % self.label_key
raise ValueError(msg)
t = kwargs[self.label_key]
del kwargs[self.label_key]
else:
raise ValueError("Invalid type: label_key")
# y_t = args[1]
with chainer.using_config('train', False), \
chainer.using_config('enable_backprop', False):
_, g_t = self.teacher(args[0])
y_s, g_s = self.predictor(args[0], **kwargs)
attention_pair = [('res2', 'fire3'), ('res3', 'fire5'),
('res4', 'fire9')]
loss_at = [
at_loss(g_t[t_layer], g_s[s_layer])
for t_layer, s_layer in attention_pair
]
self.loss = self.lossfun_hard(y_s, t) + self.beta / 2 * sum(loss_at)
self.y = y_s
reporter.report({'loss': self.loss}, self)
if self.compute_accuracy:
self.accuracy = self.accfun(self.y, t)
reporter.report({'accuracy': self.accuracy}, self)
return self.loss
def update_core(self):
batch = self._iterators['main'].next()
in_arrays = self.converter(batch, self.device)
x_data = in_arrays
batchsize = x_data.shape[0]
z = Variable(
cuda.cupy.random.normal(size=(batchsize, self.z_dim, 1, 1),
dtype=np.float32))
global x_gen
x_gen = self.gen(z)
# concatしないままdisに通すと、bnが悪さをする
x = F.concat((x_gen, x_data), 0)
y = self.dis(x)
y_gen, y_data = F.split_axis(y, 2, 0)
# sigmoid_cross_entropy(x, 0) == softplus(x)
# sigmoid_cross_entropy(x, 1) == softplus(-x)
loss_gen = F.sum(F.softplus(-y_gen))
loss_data = F.sum(F.softplus(y_data))
loss = (loss_gen + loss_data) / batchsize
for optimizer in self._optimizers.values():
optimizer.target.cleargrads()
# compute gradients all at once
loss.backward()
for optimizer in self._optimizers.values():
optimizer.update()
reporter.report({
'loss': loss,
'loss_gen': loss_gen / batchsize,
'loss_data': loss_data / batchsize
})
def evaluate(self):
bt = time.time()
with chainer.no_backprop_mode():
references = []
hypotheses = []
observation = {}
with reporter.report_scope(observation):
for i in range(0, len(self.test_data), self.batch):
src, trg = zip(*self.test_data[i:i + self.batch])
references.extend([[t.tolist()] for t in trg])
src = [chainer.dataset.to_device(self.device, x)
for x in src]
ys = [y.tolist()
for y in self.model.translate(src, self.max_length)]
hypotheses.extend(ys)
bleu = bleu_score.corpus_bleu(
references, hypotheses,
smoothing_function=bleu_score.SmoothingFunction().method1)
reporter.report({'bleu': bleu}, self.model)
et = time.time()
if self.comm is not None:
# This evaluator is called via chainermn.MultiNodeEvaluator
for i in range(0, self.comm.mpi_comm.size):
print("BleuEvaluator::evaluate(): "
"took {:.3f} [s]".format(et - bt))
sys.stdout.flush()
self.comm.mpi_comm.Barrier()
else:
# This evaluator is called from a conventional
# Chainer exntension
print("BleuEvaluator(single)::evaluate(): "
"took {:.3f} [s]".format(et - bt))
sys.stdout.flush()
return observation
def __call__(self, x, t):
# 学習対象のモデルでまず推論を行う
y = self.predictor(x)
t = cuda.to_cpu(t)
for idx, pix_val in enumerate(num_labels):
t = np.where(t == pix_val, int(idx), t)
#t = to_categorical(t)
# 5クラス分類の誤差を計算
# t = t.transpose(2, 0, 1)
t = np.array(t, dtype='int32')
#print('t:', t.shape)
t = cuda.to_gpu(t)
#print("y:", y.shape)
# chainerではsoftmax_cross_entorpyのtとして正解ラベルのint型インデックス番号を与えている
loss = F.softmax_cross_entropy(y, t)
# 予測結果（0~1の連続値を持つグレースケール画像）を二値化し，
# ChainerCVのeval_semantic_segmentation関数に正解ラベルと
# 共に渡して各種スコアを計算
#y, t = cuda.to_cpu(F.sigmoid(y).data), cuda.to_cpu(t)
#y = np.asarray(y > 0.5, dtype=np.int32)
#y, t = y[:, :, ...], t[:, :, ...]
#evals = evaluations.eval_semantic_segmentation(y, t)
# 学習中のログに出力
reporter.report(
{'loss': loss},
# 'miou': evals['miou'],
# 'pa': evals['pixel_accuracy']},
self)
return loss
def __call__(self, x, t):
h, t1 = self.calc(x)
cls_loss = F.softmax_cross_entropy(h, t)
reporter.report({'cls_loss': cls_loss}, self)
loss = cls_loss
# Enforce the transformation as orthogonal matrix
trans_loss1 = self.trans_lam1 * calc_trans_loss(t1)
reporter.report({'trans_loss': trans_loss1}, self)
loss = loss + trans_loss1
reporter.report({'loss': loss}, self)
if self.compute_accuracy:
acc = F.accuracy(h, t)
reporter.report({'accuracy': acc}, self)
return loss
def __call__(self, x, t):
h, t1, t2 = self.calc(x)
loss = functions.mean_squared_error(h, t)
reporter.report({'loss': loss}, self)
# Enforce the transformation as orthogonal matrix
if self.trans and self.trans_lam1 >= 0:
trans_loss1 = self.trans_lam1 * calc_trans_loss(t1)
reporter.report({'trans_loss1': trans_loss1}, self)
loss = loss + trans_loss1
if self.trans and self.trans_lam2 >= 0:
trans_loss2 = self.trans_lam2 * calc_trans_loss(t2)
reporter.report({'trans_loss2': trans_loss2}, self)
loss = loss + trans_loss2
reporter.report({'loss': loss}, self)
return loss
def __call__(self, trainer):
"""override method of extensions.Evaluator."""
# set up a reporter
reporter = reporter_module.Reporter()
if hasattr(self, 'name'):
prefix = self.name + '/'
else:
prefix = ''
for name, target in six.iteritems(self._targets):
reporter.add_observer(prefix + name, target)
reporter.add_observers(prefix + name,
target.namedlinks(skipself=True))
with reporter:
result, predictions, rankings = self.evaluate()
#print(result)
#print(predictions)
self.save_predictions(os.path.join(trainer.out, 'pred.txt'),
predictions)
self.save_predictions(os.path.join(trainer.out, 'ranking.txt'),
rankings)
reporter_module.report(result)
return result
def report_scores(self, y, t):
with chainer.no_backprop_mode():
if self.nested_label:
dice = mean_dice_coefficient(dice_coefficient(y[:, 0:2, ...], t[:, 0, ...]))
for i in range(1, t.shape[1]):
dices = dice_coefficient(y[:, 2 * i:2 * (i + 1), ...], t[:, i, ...])
dice = F.concat((dice, mean_dice_coefficient(dices)), axis=0)
else:
dice = dice_coefficient(y, t)
mean_dice = mean_dice_coefficient(dice)
if self.nested_label:
b, c, h, w, d = t.shape
y = F.reshape(y, (b, 2, h * c, w, d))
t = F.reshape(t, (b, h * c, w, d))
accuracy = F.accuracy(y, t)
reporter.report({
'acc': accuracy,
'mean_dc': mean_dice
})
xp = cuda.get_array_module(y)
for i in range(len(dice)):
if not xp.isnan(dice.data[i]):
reporter.report({'dc_{}'.format(i): dice[i]})
def hidden_layer(self, word_embed, section, tags, index):
"""
+ xs: word embeddings of sentences
+ ts: gold labels
+ section: sentence boundry
+ index: index of each word
"""
xs = F.split_axis(word_embed, section, axis=0)
_, __, ys = self.bi_word(None, None, xs)
ysl = self.l(F.concat(ys, axis=0))
ysl = F.split_axis(ysl, section, 0)
inds = xp.argsort(xp.array([-x.shape[0] for x in ysl]).astype('i'))
ysdes = permutate_list(ysl, inds, inv=False)
batch_ts = tags[index[:, 0]]
ts = F.split_axis(batch_ts, section, 0)
tsdes = permutate_list(ts, inds, inv=False)
ysdes = F.transpose_sequence(ysdes)
tsdes = F.transpose_sequence(tsdes)
loss = self.crf(ysdes, tsdes)
reporter.report({'loss': loss}, self)
_, predicts = self.crf.argmax(ysdes)
predicts = F.transpose_sequence(predicts)
predicts = permutate_list(predicts, inds, inv=True)
concat_predicts = F.concat(predicts, axis=0)
correct = self.xp.sum(batch_ts == concat_predicts.data)
accuracy = correct * 1.0 / batch_ts.shape[0]
reporter.report({'accuracy': accuracy}, self)
return accuracy, loss, concat_predicts, ys
def __call__(self, *args, **kwargs):
if isinstance(self.label_key, int):
if not (-len(args) <= self.label_key < len(args)):
msg = 'Label key %d is out of bounds' % self.label_key
raise ValueError(msg)
t = args[self.label_key]
if self.label_key == -1:
args = args[:-1]
else:
args = args[:self.label_key] + args[self.label_key + 1:]
elif isinstance(self.label_key, str):
if self.label_key not in kwargs:
msg = 'Label key "%s" is not found' % self.label_key
raise ValueError(msg)
t = kwargs[self.label_key]
del kwargs[self.label_key]
self.ah = None
self.y = None
self.attention = None
self.loss = None
self.accuracy = None
self.ah, self.y, self.attention = self.predictor(*args, **kwargs)
if not chainer.config.train:
self.loss = self.lossfun(self.y, t)
else:
att_loss = self.lossfun(self.ah, t)
per_loss = self.lossfun(self.y, t)
self.loss = att_loss + per_loss
reporter.report({'loss': self.loss}, self)
if self.compute_accuracy:
self.accuracy = self.accfun(self.y, t)
reporter.report({'accuracy': self.accuracy}, self)
return self.loss
def __call__(self, loc, val, y, train=True):
bs = val.data.shape[0]
ret = self.forward(loc, val, y, train=train)
pred, kld0, kld1, kldg, kldi, hypg, hypi = ret
# Compute MSE loss
mse = F.mean_squared_error(pred, y)
rmse = F.sqrt(mse) # Only used for reporting
# Now compute the total KLD loss
kldt = kld0 * self.lambda0 + kld1 * self.lambda1
kldt += kldg + kldi + hypg + hypi
# Total loss is MSE plus regularization losses
loss = mse + kldt * (1.0 / self.total_nobs)
# Log the errors
logs = {'loss': loss, 'rmse': rmse, 'kld0': kld0, 'kld1': kld1,
'kldg': kldg, 'kldi': kldi, 'hypg': hypg, 'hypi': hypi,
'hypglv': F.sum(self.hyper_feat_lv_vec.b),
'hypilv': F.sum(self.hyper_feat_delta_lv.b),
'kldt': kldt, 'bias': F.sum(self.bias_mu.b)}
reporter.report(logs, self)
return loss
def forward(self, xs1, xs2, xs3, ys, train=True):
with chainer.using_config('debug', self.debug):
# initialization
batch_size = len(ys)
direction = F.reshape(F.concat(ys, axis=0), (batch_size, 1))
label = F.concat(self.xp.array(self.xp.array(ys, self.xp.int32) < 0., self.xp.int32), axis=0)
# calculate ranking score each pair
f1 = self.encoder(xs1, xs2)
f2 = self.encoder(xs1, xs3)
# reflect direction of higher or lower ranking
ps = (f1 - f2) * direction
x = F.concat([f1, f2, ps], axis=1)
loss = F.sum(F.relu(1 - ps), axis=0)[0]
accuracy = F.accuracy(F.concat([f1, f2], axis=1), label)
if train:
reporter.report({'loss': loss}, self)
reporter.report({'accuracy': accuracy}, self)
return loss
else:
return loss, accuracy
def __call__(self, x_STF, y_STF):
"""
# Param
- X_STF (Variable: (S, T, F))
- y_STF (Variable: (S, T, F))
S: samples
T: time_steps
F: features
# Return
- loss (Variable: (1, ))
"""
seq_len = x_STF.shape[0]
# add losses
loss = 0
for t in range(seq_len):
pred = self.predictor(x_STF[t].reshape(1, -1, 1))
obs = y_STF[t]
loss += self.lossfun(pred, obs)
loss /= seq_len
reporter.report({'loss': loss}, self)
return loss
def __call__(self, trainer=None):
"""Executes the evaluator extension.
Unlike usual extensions, this extension can be executed without passing
a trainer object. This extension reports the performance on validation
dataset using the :func:`~chainer.report` function. Thus, users can use
this extension independently from any trainer by manually configuring
a :class:`~chainer.Reporter` object.
Args:
trainer (~chainer.training.Trainer): Trainer object that invokes
this extension. It can be omitted in case of calling this
extension manually.
Returns:
dict: Result dictionary that contains mean statistics of values
reported by the evaluation function.
"""
# set up a reporter
reporter = reporter_module.Reporter()
if self.name is not None:
prefix = self.name + '/'
else:
prefix = ''
for name, target in six.iteritems(self._targets):
reporter.add_observer(prefix + name, target)
reporter.add_observers(prefix + name,
target.namedlinks(skipself=True))
with reporter:
with configuration.using_config('train', False):
result = self.evaluate()
reporter_module.report(result)
return result
def update_core(self):
batch = self._iterators['main'].next()
in_arrays = self.converter(batch, self.device)
x_data = in_arrays
batchsize = x_data.shape[0]
z = x_data
y_gen, x_gen = self.gen.sub(z)
loss_gen = F.mean_squared_error(x_gen, y_gen)
loss = loss_gen / batchsize
for optimizer in self._optimizers.values():
optimizer.target.cleargrads()
# compute gradients all at once
loss.backward()
for optimizer in self._optimizers.values():
optimizer.update()
# loss will be summaried and compute_mean() per epoch
reporter.report({'loss': loss})
def update_core(self):
batch = self.get_iterator("main").next()
batchsize = len(batch)
# Train the discriminator
x_real = self.discriminator.wrap_array(batch)
y_real = self.discriminator(x_real, self.stage, self.alpha)
gradient = grad([y_real], [x_real], enable_double_backprop=True)[0]
gradient_norm = sum(batch_l2_norm_squared(gradient)) / batchsize
loss_grad = self.gamma * gradient_norm / 2
z = self.generator.generate_latent(batchsize)
mix_z = self.generator.generate_latent(
batchsize) if self.mixing > random() else None
x_fake = self.generator(z, self.stage, self.alpha, mix_z)
y_fake = self.discriminator(x_fake, self.stage, self.alpha)
loss_dis = (
(sum((y_real - 1)**2) + sum(y_fake**2)) / 2 if self.lsgan else
(sum(softplus(-y_real)) + sum(softplus(y_fake)))) / batchsize
loss_dis += loss_grad
x_fake.unchain_backward()
self.discriminator.cleargrads()
loss_dis.backward()
self.discriminator_optimizer.update()
# Train the generator
z = self.generator.generate_latent(batchsize)
mix_z = self.generator.generate_latent(
batchsize) if self.mixing > random() else None
x_fake = self.generator(z, self.stage, self.alpha, mix_z)
y_fake = self.discriminator(x_fake, self.stage, self.alpha)
loss_gen = (sum((y_fake - 1)**2) /
2 if self.lsgan else sum(softplus(-y_fake))) / batchsize
self.generator.cleargrads()
loss_gen.backward()
self.mapper_optimizer.update()
self.generator_optimizer.update()
for raw, averaged in zip(self.generator.params(),
self.averaged_generator.params()):
averaged.copydata((1 - self.decay) * raw + self.decay * averaged)
report({"alpha": self.alpha})
report({"loss (gen)": loss_gen})
report({"loss (dis)": loss_dis})
report({"loss (grad)": loss_grad})
self.alpha = min(1.0, self.alpha + self.delta)
def __call__(self, x, x_length, ns, ns_length, label):
"""
Args:
x (numpy.ndarray or cupy.ndarray): sequences of vocabulary indices
in shape (batchsize, tokens)
x_length (numpy.ndarray or cupy.ndarray): number of tokens in each
batch index of ``x``
ns (numpy.ndarray or cupy.ndarray): Negative samples.
sequences of vocabulary indices in shape (batchsize,
n_negative_samples, tokens)
ns_length (numpy.ndarray or cupy.ndarray): number of tokens in each
negative sample in shape ``(batchsize, n_negative_samples)``
label: Ignored
Returns:
chainer.Variable:
"""
z = self.sent_emb(x, x_length)
p = self.pred_topic(z)
# reconstructed sentence embedding r: (batchsize, feature size)
r = F.matmul(p, self.T)
# Embed negative sampling
bs, n_ns, _ = ns.shape
ns = ns.reshape(bs * n_ns, -1)
ns_length = ns_length.astype(np.float32).reshape(-1, 1)
n = F.sum(self.sent_emb.embed(ns), axis=1) / ns_length
if self.sent_emb.fix_embedding:
n.unchain_backward()
n = F.reshape(n, (bs, n_ns, -1))
# Calculate contrasive max-margin loss
# neg: (batchsize, n_ns)
neg = F.sum(F.broadcast_to(F.reshape(r, (bs, 1, -1)), n.shape) * n,
axis=-1)
pos = F.sum(r * z, axis=-1)
pos = F.broadcast_to(F.reshape(pos, (bs, 1)), neg.shape)
mask = chainer.Variable(self.xp.zeros(neg.shape, dtype=p.dtype))
loss_pred = F.sum(F.maximum(1. - pos + neg, mask))
reporter.report({'loss_pred': loss_pred}, self)
t_norm = F.normalize(self.T, axis=1)
loss_reg = self._orthogonality_penalty * F.sqrt(
F.sum(
F.squared_difference(
F.matmul(t_norm, t_norm, transb=True),
self.xp.eye(self.T.shape[0], dtype=np.float32))))
reporter.report({'orthogonality_penalty': loss_reg}, self)
loss = loss_pred + loss_reg
reporter.report({'loss': loss}, self)
return loss
def forward(self, x):
q_anchor = self.encoder(x[..., 0])
q_target = self.encoder(x[..., 1])
q_negative = self.encoder(x[..., 2])
z = q_anchor.sample(self.k)
logq_anchor = q_anchor.log_prob(z)
kl_target = logq_anchor - q_target.log_prob(z)
kl_negative = logq_anchor - q_negative.log_prob(z)
energy = F.mean(F.relu(self.bound + kl_target - kl_negative))
loss = energy
reporter.report({'loss': loss}, self)
reporter.report({'kl_target': F.mean(kl_target)}, self)
reporter.report({'kl_negative': F.mean(kl_negative)}, self)
reporter.report({'bound': self.bound}, self)
return loss
def forward(self, x):
accum_loss = 0.0
result = collections.defaultdict(lambda: 0)
# calculate each tree in batch ``x`` because we cannot process as batch
for tree in x:
loss, _ = self.traverse(tree, evaluate=result)
accum_loss += loss
reporter.report({'loss': accum_loss}, self)
reporter.report({'total': result['total_node']}, self)
reporter.report({'correct': result['correct_node']}, self)
return accum_loss
def update_core(self):
batch = self._iterators['main'].next()
#print(self._n)
in_arrays_list = []
for i in range(self._subdivisions):
in_arrays_list.append(
self.converter(batch[i::self._subdivisions], self.device))
#in_arrays_list.append(self.converter(batch, self.device))
optimizer = self._optimizers['main']
loss_func = self.loss_func or optimizer.target
loss_func.cleargrads()
losses = []
for i, in_arrays in enumerate(in_arrays_list):
if isinstance(in_arrays, tuple):
in_vars = list(variable.Variable(x) for x in in_arrays)
loss = loss_func(*in_vars)
elif isinstance(in_arrays, dict):
in_vars = {
key: variable.Variable(x)
for key, x in six.iteritems(in_arrays)
}
loss = loss_func(in_vars)
else:
print(type(in_arrays))
loss.backward()
#loss = {k: cuda.to_cpu(v.data) for k, v in loss.items()} # for logging
loss = cuda.to_cpu(loss.data)
losses.append(loss)
optimizer.update()
# minibatch average
if isinstance(loss, dict):
avg_loss = {k: 0. for k in losses[0].keys()}
for loss in losses:
for k, v in loss.items():
avg_loss[k] += v
#avg_loss = {k: v / float(self._batchsize) for k, v in avg_loss.items()}
avg_loss = {k: v / float(len(losses)) for k, v in avg_loss.items()}
#avg_loss = {k: v for k, v in avg_loss.items()}
# report all the loss values
for k, v in avg_loss.items():
reporter.report({k: v}, loss_func)
reporter.report({'loss': sum(list(avg_loss.values()))}, loss_func)
else:
avg_loss = 0.
for loss in losses:
avg_loss += loss
#avg_loss /= float(self._batchsize)
reporter.report({'loss': avg_loss}, loss_func)