def __init__(self, arg1, shape=None, dtype=None, copy=False):
if shape is not None and len(shape) != 2:
raise ValueError(
'Only two-dimensional sparse arrays are supported.')
if base.issparse(arg1):
x = arg1.asformat(self.format)
data = x.data
indices = x.indices
indptr = x.indptr
if arg1.format != self.format:
# When formats are differnent, all arrays are already copied
copy = False
if shape is None:
shape = arg1.shape
has_canonical_format = x.has_canonical_format
elif util.isshape(arg1):
m, n = arg1
m, n = int(m), int(n)
data = basic.zeros(0, dtype if dtype else 'd')
indices = basic.zeros(0, 'i')
indptr = basic.zeros(self._swap(m, n)[0] + 1, dtype='i')
# shape and copy argument is ignored
shape = (m, n)
copy = False
has_canonical_format = True
elif scipy_available and scipy.sparse.issparse(arg1):
# Convert scipy.sparse to cupy.sparse
x = arg1.asformat(self.format)
data = cupy.array(x.data)
indices = cupy.array(x.indices, dtype='i')
indptr = cupy.array(x.indptr, dtype='i')
copy = False
if shape is None:
shape = arg1.shape
has_canonical_format = x.has_canonical_format
elif isinstance(arg1, tuple) and len(arg1) == 3:
data, indices, indptr = arg1
if not (base.isdense(data) and data.ndim == 1 and
base.isdense(indices) and indices.ndim == 1 and
base.isdense(indptr) and indptr.ndim == 1):
raise ValueError(
'data, indices, and indptr should be 1-D')
if len(data) != len(indices):
raise ValueError('indices and data should have the same size')
has_canonical_format = False
elif base.isdense(arg1):
if arg1.ndim > 2:
raise TypeError('expected dimension <= 2 array or matrix')
elif arg1.ndim == 1:
arg1 = arg1[None]
elif arg1.ndim == 0:
arg1 = arg1[None, None]
data, indices, indptr = self._convert_dense(arg1)
copy = False
if shape is None:
shape = arg1.shape
has_canonical_format = True
else:
raise ValueError(
'Unsupported initializer format')
if dtype is None:
dtype = data.dtype
else:
dtype = numpy.dtype(dtype)
if dtype != 'f' and dtype != 'd' and dtype != 'F' and dtype != 'D':
raise ValueError(
'Only float32, float64, complex64 and complex128 '
'are supported')
data = data.astype(dtype, copy=copy)
sparse_data._data_matrix.__init__(self, data)
self.indices = indices.astype('i', copy=copy)
self.indptr = indptr.astype('i', copy=copy)
if shape is None:
shape = self._swap(len(indptr) - 1, int(indices.max()) + 1)
major, minor = self._swap(*shape)
if len(indptr) != major + 1:
raise ValueError('index pointer size (%d) should be (%d)'
% (len(indptr), major + 1))
self._descr = cusparse.MatDescriptor.create()
self._shape = shape
self._has_canonical_format = has_canonical_format
def __init__(self, arg1, shape=None, dtype=None, copy=False):
if shape is not None and len(shape) != 2:
raise ValueError(
'Only two-dimensional sparse arrays are supported.')
if base.issparse(arg1):
x = arg1.asformat(self.format)
data = x.data
row = x.row
col = x.col
if arg1.format != self.format:
# When formats are differnent, all arrays are already copied
copy = False
if shape is None:
shape = arg1.shape
has_canonical_format = x.has_canonical_format
elif util.isshape(arg1):
m, n = arg1
m, n = int(m), int(n)
data = cupy.zeros(0, dtype if dtype else 'd')
row = cupy.zeros(0, dtype='i')
col = cupy.zeros(0, dtype='i')
# shape and copy argument is ignored
shape = (m, n)
copy = False
has_canonical_format = True
elif isinstance(arg1, tuple) and len(arg1) == 2:
try:
data, (row, col) = arg1
except (TypeError, ValueError):
raise TypeError('invalid input format')
if not (base.isdense(data) and data.ndim == 1 and
base.isdense(row) and row.ndim == 1 and
base.isdense(col) and col.ndim == 1):
raise ValueError('row, column, and data arrays must be 1-D')
if not (len(data) == len(row) == len(col)):
raise ValueError(
'row, column, and data array must all be the same length')
has_canonical_format = False
else:
raise ValueError(
'Only (data, (row, col)) format is supported')
if dtype is None:
dtype = data.dtype
else:
dtype = numpy.dtype(dtype)
if dtype != 'f' and dtype != 'd':
raise ValueError('Only float32 and float64 are supported')
data = data.astype(dtype, copy=copy)
row = row.astype('i', copy=copy)
col = col.astype('i', copy=copy)
if shape is None:
if len(row) == 0 or len(col) == 0:
raise ValueError(
'cannot infer dimensions from zero sized index arrays')
shape = (int(row.max()) + 1, int(col.max()) + 1)
if len(data) > 0:
if row.max() >= shape[0]:
raise ValueError('row index exceeds matrix dimensions')
if col.max() >= shape[1]:
raise ValueError('column index exceeds matrix dimensions')
if row.min() < 0:
raise ValueError('negative row index found')
if col.min() < 0:
raise ValueError('negative column index found')
sparse_data._data_matrix.__init__(self, data)
self.row = row
self.col = col
self._shape = shape
self._has_canonical_format = has_canonical_format