import numpy
import theano
import theano.tensor as T
if not sys.path.count("../../lib"): sys.path.append("../../lib")
from utils_abhi import load_data
from mlp import MLP
learning_rate = 0.01
L1_reg = 0.00
L2_reg = 0.0001
n_epochs = 1000
batch_size = 20
n_hidden = 500
train_filename = 'paintings_train.csv'
test_filename = 'paintings_test.csv'
datasets = load_data(train_filename, test_filename)
train_set_x, train_set_y = datasets[0]
valid_set_x, valid_set_y = datasets[1]
test_set_x, test_set_y = datasets[2]
# compute number of minibatches for training, validation and testing
n_train_batches = train_set_x.get_value(borrow=True).shape[0] / batch_size
n_valid_batches = valid_set_x.get_value(borrow=True).shape[0] / batch_size
n_test_batches = test_set_x.get_value(borrow=True).shape[0] / batch_size
######################
# BUILD ACTUAL MODEL #
######################
print '... building the model'
def test_sda(
train_file_name ='../data/five_class_full/Paintings_train.csv',
test_file_name ='../data/five_class_full/Paintings_test.csv',
finetune_lr=0.1,
pretraining_epochs=15,
pretrain_lr=0.001,
training_epochs=1000,
batch_size=10):
"""
Demonstrates how to train and test a stochastic dN_train+N_validenoising
autoencoder.
This is demonstrated on MNIST.
:train_file_name: string
:param train_file_name: Input numpy training file
:test_file_name: string
:param test_file_name: Input numpy testing file
:type learning_rate: float
:param learning_rate: learning rate used in the finetune stage
(factor for the stochastic gradient)
:type pretraining_epochs: int
:param pretraining_epochs: number of epoch to do pretraining
:type pretrain_lr: float
:param pretrain_lr: learning rate to be used during pre-training
:type n_iter: int
:param n_iter: maximal number of iterations ot run the optimizer
Returns tuple of best validataion loss and test score
"""
# Change here
datasets = load_data(train_file_name, test_file_name)
# End of change
train_set_x, train_set_y = datasets[0] # TODO remove this second limiter
valid_set_x, valid_set_y = datasets[1]
test_set_x, test_set_y = datasets[2]
import ipdb; ipdb.set_trace()
# compute number of minibatches for training, validation and testing
n_train_batches = train_set_x.get_value(borrow=True).shape[0]
n_train_batches /= batch_size
n_ins = train_set_x.get_value(borrow=True).shape[1]
n_outs = 5
# numpy random generator
numpy_rng = numpy.random.RandomState(89677)
print '... building the model'
# construct the stacked denoising autoencoder class
sda = SdA2(numpy_rng=numpy_rng, n_ins= n_ins,
hidden_layers_sizes=[1000, 1000, 1000],
n_outs=n_outs, corruption_levels=[.1,.2,.3])
#Checking precision
# get python variable from theano variable
test_y_pyvar = get_y_from_shared(test_set_y)
test_x_pyvar = test_set_x.get_value()
print 'The precision is ', sda.precision(test_x_pyvar, test_y_pyvar)
#########################
# PRETRAINING THE MODEL #
#########################
print '... getting the pretraining functions'
pretraining_fns = sda.pretraining_functions(train_set_x=train_set_x,
batch_size=batch_size)
print '... pre-training the model'
start_time = time.clock()
## Pre-train layer-wise
corruption_levels = [.1, .2, .3]
for i in xrange(sda.n_layers):
# go through pretraining epochs
for epoch in xrange(pretraining_epochs):
# go through the training set
c = []
for batch_index in xrange(n_train_batches):
c.append(pretraining_fns[i](index=batch_index,
corruption=corruption_levels[i],
lr=pretrain_lr))
print 'Pre-training layer %i, epoch %d, cost ' % (i, epoch),
print numpy.mean(c)
end_time = time.clock()
print >> sys.stderr, ('The pretraining code for file ' +
os.path.split(__file__)[1] +
' ran for %.2fm' % ((end_time - start_time) / 60.))
########################
# FINETUNING THE MODEL #
########################
# get the training, validation and testing function for the model
print '... getting the finetuning functions'
train_fn, validate_model, test_model = sda.build_finetune_functions(
datasets=datasets, batch_size=batch_size,
learning_rate=finetune_lr)
print '... finetunning the model'
# early-stopping parameters
patience = 10 * n_train_batches # look as this many examples regardless
patience_increase = 2. # wait this much longer when a new best is
# found
improvement_threshold = 0.995 # a relative improvement of this much is
# considered significant
validation_frequency = min(n_train_batches, patience / 2)
# go through this many
# minibatche before checking the network
# on the validation set; in this case we
# check every epoch
best_params = None
best_validation_loss = numpy.inf
test_score = 0.
start_time = time.clock()
done_looping = False
epoch = 0
while (epoch < training_epochs) and (not done_looping):
epoch = epoch + 1
for minibatch_index in xrange(n_train_batches):
minibatch_avg_cost = train_fn(minibatch_index)
iter = (epoch - 1) * n_train_batches + minibatch_index
if (iter + 1) % validation_frequency == 0:
validation_losses = validate_model()
this_validation_loss = numpy.mean(validation_losses)
print('epoch %i, minibatch %i/%i, validation error %f %%' %
(epoch, minibatch_index + 1, n_train_batches,
this_validation_loss * 100.))
# if we got the best validation score until now
if this_validation_loss < best_validation_loss:
#improve patience if loss improvement is good enough
if (this_validation_loss < best_validation_loss *
improvement_threshold):
patience = max(patience, iter * patience_increase)
# save best validation score and iteration number
best_validation_loss = this_validation_loss
best_iter = iter
# test it on the test set
test_losses = test_model()
test_score = numpy.mean(test_losses)
print((' epoch %i, minibatch %i/%i, test error of '
'best model %f %%') %
(epoch, minibatch_index + 1, n_train_batches,
test_score * 100.))
if patience <= iter:
done_looping = True
break
end_time = time.clock()
print(('Optimization complete with best validation score of %f %%,'
'with test performance %f %%') %
(best_validation_loss * 100., test_score * 100.))
print >> sys.stderr, ('The training code for file ' +
os.path.split(__file__)[1] +
' ran for %.2fm' % ((end_time - start_time) / 60.))
#Checking precision
# get python variable from theano variable
test_y_pyvar = get_y_from_shared(test_set_y)
test_x_pyvar = test_set_x.get_value()
print 'The precision is ', sda.precision(test_x_pyvar, test_y_pyvar)
print 'The recall is ', sda.recall(test_x_pyvar, test_y_pyvar)
clr = sda.classification_report(test_x_pyvar, test_y_pyvar)
print 'The classification report is ', clr
# End
return sda
import numpy
import theano
import theano.tensor as T
if not sys.path.count("../../lib"): sys.path.append("../../lib")
from utils_abhi import load_data
from mlp import MLP
learning_rate=0.01
L1_reg=0.00
L2_reg=0.0001
n_epochs=1000
batch_size=20
n_hidden=500
train_filename ='paintings_train.csv'
test_filename = 'paintings_test.csv'
datasets = load_data(train_filename, test_filename)
train_set_x, train_set_y = datasets[0]
valid_set_x, valid_set_y = datasets[1]
test_set_x, test_set_y = datasets[2]
# compute number of minibatches for training, validation and testing
n_train_batches = train_set_x.get_value(borrow=True).shape[0] / batch_size
n_valid_batches = valid_set_x.get_value(borrow=True).shape[0] / batch_size
n_test_batches = test_set_x.get_value(borrow=True).shape[0] / batch_size
######################
# BUILD ACTUAL MODEL #
######################
print '... building the model'
def test_sda(train_file_name='../data/five_class_full/Paintings_train.csv',
test_file_name='../data/five_class_full/Paintings_test.csv',
finetune_lr=0.1,
pretraining_epochs=15,
pretrain_lr=0.001,
training_epochs=1000,
batch_size=10):
"""
Demonstrates how to train and test a stochastic dN_train+N_validenoising
autoencoder.
This is demonstrated on MNIST.
:train_file_name: string
:param train_file_name: Input numpy training file
:test_file_name: string
:param test_file_name: Input numpy testing file
:type learning_rate: float
:param learning_rate: learning rate used in the finetune stage
(factor for the stochastic gradient)
:type pretraining_epochs: int
:param pretraining_epochs: number of epoch to do pretraining
:type pretrain_lr: float
:param pretrain_lr: learning rate to be used during pre-training
:type n_iter: int
:param n_iter: maximal number of iterations ot run the optimizer
Returns tuple of best validataion loss and test score
"""
# Change here
datasets = load_data(train_file_name, test_file_name)
# End of change
train_set_x, train_set_y = datasets[0] # TODO remove this second limiter
valid_set_x, valid_set_y = datasets[1]
test_set_x, test_set_y = datasets[2]
import ipdb
ipdb.set_trace()
# compute number of minibatches for training, validation and testing
n_train_batches = train_set_x.get_value(borrow=True).shape[0]
n_train_batches /= batch_size
n_ins = train_set_x.get_value(borrow=True).shape[1]
n_outs = 5
# numpy random generator
numpy_rng = numpy.random.RandomState(89677)
print '... building the model'
# construct the stacked denoising autoencoder class
sda = SdA2(numpy_rng=numpy_rng,
n_ins=n_ins,
hidden_layers_sizes=[1000, 1000, 1000],
n_outs=n_outs,
corruption_levels=[.1, .2, .3])
#Checking precision
# get python variable from theano variable
test_y_pyvar = get_y_from_shared(test_set_y)
test_x_pyvar = test_set_x.get_value()
print 'The precision is ', sda.precision(test_x_pyvar, test_y_pyvar)
#########################
# PRETRAINING THE MODEL #
#########################
print '... getting the pretraining functions'
pretraining_fns = sda.pretraining_functions(train_set_x=train_set_x,
batch_size=batch_size)
print '... pre-training the model'
start_time = time.clock()
## Pre-train layer-wise
corruption_levels = [.1, .2, .3]
for i in xrange(sda.n_layers):
# go through pretraining epochs
for epoch in xrange(pretraining_epochs):
# go through the training set
c = []
for batch_index in xrange(n_train_batches):
c.append(pretraining_fns[i](index=batch_index,
corruption=corruption_levels[i],
lr=pretrain_lr))
print 'Pre-training layer %i, epoch %d, cost ' % (i, epoch),
print numpy.mean(c)
end_time = time.clock()
print >> sys.stderr, ('The pretraining code for file ' +
os.path.split(__file__)[1] + ' ran for %.2fm' %
((end_time - start_time) / 60.))
########################
# FINETUNING THE MODEL #
########################
# get the training, validation and testing function for the model
print '... getting the finetuning functions'
train_fn, validate_model, test_model = sda.build_finetune_functions(
datasets=datasets, batch_size=batch_size, learning_rate=finetune_lr)
print '... finetunning the model'
# early-stopping parameters
patience = 10 * n_train_batches # look as this many examples regardless
patience_increase = 2. # wait this much longer when a new best is
# found
improvement_threshold = 0.995 # a relative improvement of this much is
# considered significant
validation_frequency = min(n_train_batches, patience / 2)
# go through this many
# minibatche before checking the network
# on the validation set; in this case we
# check every epoch
best_params = None
best_validation_loss = numpy.inf
test_score = 0.
start_time = time.clock()
done_looping = False
epoch = 0
while (epoch < training_epochs) and (not done_looping):
epoch = epoch + 1
for minibatch_index in xrange(n_train_batches):
minibatch_avg_cost = train_fn(minibatch_index)
iter = (epoch - 1) * n_train_batches + minibatch_index
if (iter + 1) % validation_frequency == 0:
validation_losses = validate_model()
this_validation_loss = numpy.mean(validation_losses)
print('epoch %i, minibatch %i/%i, validation error %f %%' %
(epoch, minibatch_index + 1, n_train_batches,
this_validation_loss * 100.))
# if we got the best validation score until now
if this_validation_loss < best_validation_loss:
#improve patience if loss improvement is good enough
if (this_validation_loss <
best_validation_loss * improvement_threshold):
patience = max(patience, iter * patience_increase)
# save best validation score and iteration number
best_validation_loss = this_validation_loss
best_iter = iter
# test it on the test set
test_losses = test_model()
test_score = numpy.mean(test_losses)
print((' epoch %i, minibatch %i/%i, test error of '
'best model %f %%') %
(epoch, minibatch_index + 1, n_train_batches,
test_score * 100.))
if patience <= iter:
done_looping = True
break
end_time = time.clock()
print(('Optimization complete with best validation score of %f %%,'
'with test performance %f %%') %
(best_validation_loss * 100., test_score * 100.))
print >> sys.stderr, ('The training code for file ' +
os.path.split(__file__)[1] + ' ran for %.2fm' %
((end_time - start_time) / 60.))
#Checking precision
# get python variable from theano variable
test_y_pyvar = get_y_from_shared(test_set_y)
test_x_pyvar = test_set_x.get_value()
print 'The precision is ', sda.precision(test_x_pyvar, test_y_pyvar)
print 'The recall is ', sda.recall(test_x_pyvar, test_y_pyvar)
clr = sda.classification_report(test_x_pyvar, test_y_pyvar)
print 'The classification report is ', clr
# End
return sda
