def run(self):
# Extract features from model.
preproc = Standardize()
if self.model:
self.model.fn = self.model.function("perform",
**self.model_call_kwargs)
newtrain = self.extract_features(self.trainset, preproc, can_fit=True)
newtest = self.extract_features(self.testset, preproc, can_fit=False)
newvalid = newtest if not self.validset else\
self.extract_features(self.validset, preproc, can_fit=False)
# Find optimal SVM hyper-parameters.
(best_svm, train_error, valid_error) = cross_validate_svm(
self.svm, (newtrain.X, self.trainset_y),
(newvalid.X, self.validset_y), self.C_list)
logging.info('Best train/valid error for C=%f : %f \t %f' %
(best_svm.C, train_error, valid_error))
# Optionally retrain on validation set, using optimal hyperparams.
if self.validset and self.retrain_on_valid:
retrain_svm(best_svm, (newtrain.X, self.trainset_y),
(newvalid.X, self.validset_y))
test_error = compute_test_error(best_svm, (newtest.X, self.testset_y))
logging.info('Test error = %f' % test_error)
if self.save_fname:
fp = open(self.save_fname, 'w')
pickle.dump(best_svm, fp)
fp.close()
return best_svm, (train_error, valid_error, test_error)
def get_dataset_icml():
base_path = '${PYLEARN2_DATA_PATH}/icml_2013_black_box'
process= Standardize()
trainset = BlackBoxDataset(which_set = 'train',start = 0, stop = 900)
validset = BlackBoxDataset(which_set = 'train',start = 900, stop = 1000)
extraset = BlackBoxDataset(which_set = 'extra',start = 0, stop = 1000) #trainset
testset = BlackBoxDataset(which_set = 'public_test')
# process.apply(extraset,can_fit=True)
# process.apply(trainset)
# process.apply(validset)
# process.apply(testset)
return trainset, validset, testset, extraset
def run(self, retrain_on_valid=True):
# Extract features from model.
preproc = Standardize()
self.model.fn = self.model.function("perform", **self.model_call_kwargs)
newtrain = self.extract_features(self.trainset, preproc, can_fit=True)
newtest = self.extract_features(self.testset, preproc, can_fit=False)
newvalid = newtest if not self.validset else\
self.extract_features(self.validset, preproc, can_fit=False)
# Find the best number of training epochs
best_nb_epoch, valid_error = cross_validate_logistic_regression(
(newtrain.X, self.trainset_y),
(newtest.X, self.testset_y),
self.n_epoch_list)
logging.info('Best validation error for n_epoch=%i : %f' % (best_nb_epoch, valid_error))
# Measure test error with the optimal number of epochs
# (retraining on train and valid if applicable)
if self.validset and retrain_on_valid:
full_train_X = numpy.vstack((newtrain.X, newvalid.X))
full_train_Y = numpy.hstack((self.trainset_y, self.validset_y))
else:
full_train_X = newtrain.X
full_train_Y = self.trainset_y
full_test_X = newtest.X
full_test_Y = self.testset_y
best_params, test_error = test_logistic_regression((full_train_X, full_train_Y),
(full_test_X, full_test_Y),
best_nb_epoch)
logging.info('Test error = %f' % test_error)
if self.save_fname:
fp = open(self.save_fname, 'w')
pickle.dump(best_params, fp)
fp.close()
return (best_params, valid_error, test_error)
import numpy
from pylearn2.datasets.preprocessing import Standardize, LeCunLCN, GlobalContrastNormalization
from pylearn2.datasets.tfd import TFD
import cPickle as pkl
theano.subtensor_merge_bug=False
if __name__ == "__main__":
weights_file = "../out/pae_mnist_enc_weights.npy"
input = T.matrix("X", dtype=theano.config.floatX)
tfd_ds = TFD("unlabeled")
print "TFD shape: ", tfd_ds.X.shape
gcn = GlobalContrastNormalization()
standardizer = Standardize()
lcn = LeCunLCN(img_shape=(48, 48), channels=[0])
gcn.apply(tfd_ds, can_fit=True)
standardizer.apply(tfd_ds, can_fit=True)
lcn.apply(tfd_ds)
rnd = numpy.random.RandomState(1231)
powerup = PowerupAutoencoder(input,
nvis=48*48,
nhid=500,
momentum=0.66,
rho=0.92,
num_pieces=4,
cost_type="MeanSquaredCost",
L2_reg=8.2*1e-5,
parser.add_argument("model_path", nargs=1)
options = parser.parse_args()
out = options.out[0]
<<<<<<< HEAD
out = out.strip('.npy')
model_path = options.model_path[0]
try:
model = serial.load(model_path)
except Exception, e:
print model_path + "doesn't seem to be a valid model path, I got this error when trying to load it: "
print e
dataset = yaml_parse.load(model.dataset_yaml_src.replace('/data/afew/facetubes/p10','/data/lisatmp/bouthilx/facetubes/p10'))
preprocessor = Standardize()
preprocessor.apply(dataset.raw,can_fit=True)
X = dataset.raw.get_design_matrix()
X = X.reshape(X.shape[0],3,96,96).transpose(0,2,3,1)
# X = X.reshape(X.shape[0],96,96,3)
mean = X.mean(axis=0)
std = X.std(axis=0)
std_eps = 1e-4
print mean.shape
print std.shape
# print preprocessor._mean, mean
# print preprocessor._std,std
class DummyDataset:
def __init__(self,X):
self.X = X.transpose(0,3,1,2).reshape(X.shape[0],np.prod(X.shape[1:]))
from pylearn2.datasets.norb_small import FoveatedNORB
dataset = FoveatedNORB(which_set='train')
from pylearn2.datasets.preprocessing import Standardize
standardize = Standardize(global_mean=True, global_std=True)
standardize.apply(dataset, can_fit=True)
from pylearn2.utils import serial
serial.save("norb_prepro_global.pkl", standardize)
def get_layer_MLP():
extraset = BlackBoxDataset( which_set = 'extra')
processor = Standardize();
processor.apply(extraset,can_fit=True)
trainset = BlackBoxDataset( which_set = 'train',
start = 0,
stop = 900,
preprocessor = processor,
fit_preprocessor = True,
fit_test_preprocessor = True,
)
validset = BlackBoxDataset( which_set = 'train',
start = 900,
stop = 1000 ,
preprocessor = processor,
fit_preprocessor = True,
fit_test_preprocessor = False,
)
dropCfg = { 'input_include_probs': { 'h0' : .8 } ,
'input_scales': { 'h0': 1.}
}
config = { 'learning_rate': .05,
'init_momentum': .00,
'cost' : Dropout(**dropCfg),
'monitoring_dataset': { 'train' : trainset,
'valid' : validset
},
'termination_criterion': MonitorBased(channel_name='valid_y_misclass',N=100,prop_decrease=0),
'update_callbacks': None
}
config0 = {
'layer_name': 'h0',
'num_units': 1875,
'num_pieces': 2,
'irange': .05,
# Rather than using weight decay, we constrain the norms of the weight vectors
'max_col_norm': 2.
}
config1 = {
'layer_name': 'h1',
'num_units': 700,
'num_pieces': 2,
'irange': .05,
# Rather than using weight decay, we constrain the norms of the weight vectors
'max_col_norm': 2.
}
sftmaxCfg = {
'layer_name': 'y',
'init_bias_target_marginals': trainset,
# Initialize the weights to all 0s
'irange': .0,
'n_classes': 9
}
l1 = Maxout(**config0)
l2 = Maxout(**config1)
l3 = Softmax(**sftmaxCfg)
train_algo = SGD(**config)
model = MLP(batch_size=75,layers=[l1,l2,l3],nvis=1875)
return Train(model = model,
dataset = trainset,
algorithm = train_algo,
extensions = None,
save_path = "maxout_best_model.pkl",
save_freq = 1)
from pylearn2.datasets.norb_small import FoveatedNORB
dataset = FoveatedNORB(which_set='train')
from pylearn2.datasets.preprocessing import Standardize
standardize = Standardize()
standardize.apply(dataset, can_fit=True)
from pylearn2.utils import serial
serial.save("norb_prepro.pkl", standardize)
from pylearn2.datasets.preprocessing import Standardize, LeCunLCN, GlobalContrastNormalization
from pylearn2.datasets.tfd import TFD
import pickle as pkl
theano.subtensor_merge_bug = False
if __name__ == "__main__":
weights_file = "../out/pae_mnist_enc_weights.npy"
input = T.matrix("X", dtype=theano.config.floatX)
tfd_ds = TFD("unlabeled")
print(("TFD shape: ", tfd_ds.X.shape))
gcn = GlobalContrastNormalization()
standardizer = Standardize()
lcn = LeCunLCN(img_shape=(48, 48), channels=[0])
gcn.apply(tfd_ds, can_fit=True)
standardizer.apply(tfd_ds, can_fit=True)
lcn.apply(tfd_ds)
rnd = numpy.random.RandomState(1231)
powerup = PowerupAutoencoder(input,
nvis=48 * 48,
nhid=500,
momentum=0.66,
rho=0.92,
num_pieces=4,
cost_type="MeanSquaredCost",
L2_reg=8.2 * 1e-5,
