def create_dataset_matrix(self, label='binarydataset', other_random_seed=-1):
if self.reset_random_seed or (other_random_seed != -1 and other_random_seed != self.configuration['random_seed']):
if other_random_seed == -1:
random.seed(self.configuration['random_seed'])
else:
random.seed(other_random_seed)
self.reset_random_seed = False
(X, col_labels_X) = self.create_random_binary_matrix(
self.configuration['row_count'],
self.configuration['features']
)
(Y, col_labels_Y) = self.create_random_binary_matrix(
self.configuration['row_count'],
self.configuration['objectives']
)
datasetmatrix = DatasetMatrix(label)
datasetmatrix.X = X.tocsr()
datasetmatrix.Y = Y.tocsr()
datasetmatrix.row_labels = ['row{}'.format(i) for i in range(0, self.configuration['row_count'])]
datasetmatrix.column_labels_X = col_labels_X
datasetmatrix.column_labels_Y = col_labels_Y
datasetmatrix.metadata['source'] = self
return datasetmatrix
def default_datasetmatrix(label):
sample_count = 8
feature_count = 8
datasetmatrix = DatasetMatrix(label)
datasetmatrix.row_labels = [
'row{}'.format(i) for i in range(0, sample_count)
]
datasetmatrix.column_labels_X = [
'feature{}'.format(i) for i in range(0, feature_count)
]
datasetmatrix.column_labels_Y = ['objective']
datasetmatrix.Y = scipy.sparse.csr_matrix(
numpy.array([
[1], # training sample
[0], # training sample
[1], # testing sample
[0], # testing sample
[1], # testing sample
[0], # training sample
[1], # testing sample
[0] # testing sample
]))
datasetmatrix.X = scipy.sparse.csr_matrix(
numpy.array([
[1, 1, 1, 1, 0, 1, 0, 1], # training sample
[0, 1, 1, 1, 1, 0, 0, 1], # training sample
[1, 1, 1, 0, 0, 0, 1, 0], # testing sample
[0, 0, 1, 0, 1, 1, 1, 0], # testing sample
[1, 1, 0, 1, 0, 0, 1, 1], # testing sample
[0, 0, 0, 1, 1, 1, 0, 1], # training sample
[1, 1, 1, 1, 0, 0, 1, 0], # testing sample
[0, 0, 0, 1, 1, 1, 1, 0] # testing sample
]))
return datasetmatrix
def create_dataset_matrix(self, label='datasetsource'):
"""
The required method of a :py:class:`DatasetSource` class. This method
reads an external source of data and produces a
:py:class:`DatasetMatrix <mbtk.dataset.DatasetMatrix.DatasetMatrix>`
instance based on ``configuration``.
:param str label: The label of the ``DatasetMatrix``
"""
datasetmatrix = DatasetMatrix(label)
datasetmatrix.X = scipy.sparse.csr_matrix(numpy.identity(8))
datasetmatrix.Y = scipy.sparse.csr_matrix(numpy.identity(8))
datasetmatrix.row_labels = ["row{}".format(r) for r in range(8)]
datasetmatrix.column_labels_X = ["colX{}".format(c) for c in range(8)]
datasetmatrix.column_labels_Y = ["colY{}".format(c) for c in range(8)]
datasetmatrix.metadata['source'] = self
return datasetmatrix
def create_dataset_matrix(self,
label='bayesian_network',
other_random_seed=-1):
method = self.configuration.get('method', 'random')
if method == 'random':
instances_matrix = self.create_random_instances(
label, other_random_seed)
elif method == 'exact':
instances_matrix = self.create_exact_instances(self, label)
sample_count = self.configuration['sample_count']
numpy_datatype = self.configuration.get('numpy_datatype', numpy.int8)
X = numpy.empty((sample_count, 0), dtype=numpy_datatype)
Y = numpy.empty((sample_count, 0), dtype=numpy_datatype)
objective_names = sorted(self.configuration.get('objectives', []))
feature_names = list(
sorted(
list(
set(self.bayesian_network.variable_node_names()) -
set(objective_names))))
for varname in feature_names:
varindex = self.bayesian_network.variable_nodes_index(varname)
feature = instances_matrix[:, varindex][numpy.newaxis].T
X = numpy.hstack((X, feature))
for varname in objective_names:
varindex = self.bayesian_network.variable_nodes_index(varname)
objective = instances_matrix[:, varindex][numpy.newaxis].T
Y = numpy.hstack((Y, objective))
datasetmatrix = DatasetMatrix(label)
datasetmatrix.X = scipy.sparse.csr_matrix(X)
datasetmatrix.Y = scipy.sparse.csr_matrix(Y)
datasetmatrix.row_labels = [
'row{}'.format(i) for i in range(0, sample_count)
]
datasetmatrix.column_labels_X = feature_names
datasetmatrix.column_labels_Y = objective_names
datasetmatrix.metadata['source'] = self
return datasetmatrix
def create_dataset_matrix(self, label='rcv1v2', feature_type='', filters=None):
"""
Create a :class:`DatasetMatrix
<mbtk.dataset.DatasetMatrix.DatasetMatrix>` object containing a
document-term matrix based on the documents in the RCV1v2 dataset
(previously downloaded).
If ``configuration['filters']`` has been defined, then only the
documents that match the specified filters will be represented as rows
of the returned ``DatasetMatrix`` object. Otherwise, all documents in
RCV1v2 will be loaded.
If ``configuration['feature_type'] == 'wordcount'``, then the ``X``
matrix of the returned ``DatasetMatrix`` object will contain the counts
of each word in every document.
If ``configuration['feature_type'] == 'binary'``, then the ``X`` matrix
of the returned ``DatasetMatrix`` object will contain only values of
``0`` and ``1``, indicating the absence and presence, respectively, of
a word in a document. See the `Wikipedia article on document-term
matrices`_ for more details.
.. _Wikipedia article on document-term matrices:\
https://en.wikipedia.org/wiki/Document-term_matrix
:param str label: The label to be set on the returned ``DatasetMatrix`` instance.
:return: A ``DatasetMatrix`` containing a document-term matrix in ``X`` and a class-assignment matrix in ``Y``.
:rtype: mbtk.dataset.DatasetMatrix.DatasetMatrix
"""
if filters is None:
filters = dict()
documentIDs = list()
if len(filters) == 0:
filters = self.configuration['filters']
if 'industry' in filters.keys():
documentIDs = self.read_documentIDs_in_industry(filters['industry'])
elif len(filters) == 0:
documentIDs = self.read_all_documentIDs()
else:
raise ValueError("Unsupported RCV1v2 document filter specified. Either specify \
the 'industry' filter or no filter at all.")
if feature_type == '':
feature_type = self.configuration.get('feature_type', 'wordcount')
documents = self.read_documents(documentIDs)
words = self.gather_complete_word_list(documents)
topics = self.gather_complete_topic_list(documents)
dok_matrix_words, dok_matrix_topics = self.create_dok_matrices(documents, documentIDs, words, topics, feature_type)
datasetmatrix = DatasetMatrix(label)
datasetmatrix.X = dok_matrix_words.tocsr()
datasetmatrix.Y = dok_matrix_topics.tocsr()
datasetmatrix.row_labels = list(map(str, documentIDs))
datasetmatrix.column_labels_X = words
datasetmatrix.column_labels_Y = topics
datasetmatrix.metadata['source'] = self
return datasetmatrix