def __init__(self, which_set, standardize):
if 'PYLEARN2_DATA_PATH' not in os.environ:
raise NoDataPathError()
if not os.path.exists(os.path.join(os.environ['PYLEARN2_DATA_PATH'], 'avicenna')):
raise NotInstalledError() #XXX: check path
#train, valid, test = N.random.randn(50,50), N.random.randn(50,50), N.random.randn(50,50)
#print "avicenna hacked to load small random data instead of actual data"
train, valid, test = utlc.load_ndarray_dataset('avicenna')
if which_set == 'train':
self.X = train
elif which_set == 'valid':
self.X = valid
elif which_set == 'test':
self.X = test
else:
assert False
if standardize:
union = N.concatenate([train,valid,test],axis=0)
self.X -= union.mean(axis=0)
std = union.std(axis=0)
std[std < 1e-3] = 1e-3
self.X /= std
def __init__(self, which_set, standardize):
"""
.. todo::
WRITEME
"""
#train, valid, test = N.random.randn(50,50), N.random.randn(50,50), N.random.randn(50,50)
#print "avicenna hacked to load small random data instead of actual data"
train, valid, test = utlc.load_ndarray_dataset('avicenna')
if which_set == 'train':
self.X = train
elif which_set == 'valid':
self.X = valid
elif which_set == 'test':
self.X = test
else:
assert False
if standardize:
union = N.concatenate([train,valid,test],axis=0)
self.X -= union.mean(axis=0)
std = union.std(axis=0)
std[std < 1e-3] = 1e-3
self.X /= std
def load_data(conf):
"""
Loads a specified dataset according to the parameters in the dictionary
Parameters
----------
conf : WRITEME
Returns
-------
WRITEME
"""
print '... loading dataset'
# Special case for sparse format
if conf.get('sparse', False):
expected = inspect.getargspec(load_sparse_dataset)[0][1:]
data = load_sparse_dataset(conf['dataset'], **subdict(conf, expected))
valid, test = data[1:3]
# Sparse TERRY data on LISA servers contains an extra null first row in
# valid and test subsets.
if conf['dataset'] == 'terry':
valid = valid[1:]
test = test[1:]
assert valid.shape[0] == test.shape[0] == 4096, \
'Sparse TERRY data loaded has wrong number of examples'
if len(data) == 3:
return [data[0], valid, test]
else:
return [data[0], valid, test, data[3]]
# Load as the usual ndarray
expected = inspect.getargspec(load_ndarray_dataset)[0][1:]
data = load_ndarray_dataset(conf['dataset'], **subdict(conf, expected))
# Special case for on-the-fly normalization
if conf.get('normalize_on_the_fly', False):
return data
# Allocate shared variables
def shared_dataset(data_x):
"""Function that loads the dataset into shared variables"""
if conf.get('normalize', True):
return sharedX(data_x, borrow=True)
else:
return theano.shared(theano._asarray(data_x), borrow=True)
return map(shared_dataset, data)
def load_data(conf):
"""
Loads a specified dataset according to the parameters in the dictionary
"""
print '... loading dataset'
# Special case for sparse format
if conf.get('sparse', False):
expected = inspect.getargspec(load_sparse_dataset)[0][1:]
data = load_sparse_dataset(conf['dataset'], **subdict(conf, expected))
valid, test = data[1:3]
# Sparse TERRY data on LISA servers contains an extra null first row in
# valid and test subsets.
if conf['dataset'] == 'terry':
valid = valid[1:]
test = test[1:]
assert valid.shape[0] == test.shape[0] == 4096, \
'Sparse TERRY data loaded has wrong number of examples'
if len(data) == 3:
return [data[0], valid, test]
else:
return [data[0], valid, test, data[3]]
# Load as the usual ndarray
expected = inspect.getargspec(load_ndarray_dataset)[0][1:]
data = load_ndarray_dataset(conf['dataset'], **subdict(conf, expected))
# Special case for on-the-fly normalization
if conf.get('normalize_on_the_fly', False):
return data
# Allocate shared variables
def shared_dataset(data_x):
"""Function that loads the dataset into shared variables"""
if conf.get('normalize', True):
return sharedX(data_x, borrow=True)
else:
return theano.shared(theano._asarray(data_x), borrow=True)
return map(shared_dataset, data)