def tocsr(self, copy=False):
"""Converts the matrix to Compressed Sparse Row format.
Args:
copy (bool): If ``False``, it shares data arrays as much as
possible. Actually this option is ignored because all
arrays in a matrix cannot be shared in coo to csr conversion.
Returns:
cupy.sparse.csr_matrix: Converted matrix.
"""
if self.nnz == 0:
return csr.csr_matrix(self.shape, dtype=self.dtype)
# copy is ignored because coosort method breaks an original.
x = self.copy()
cusparse.coosort(x)
return cusparse.coo2csr(x)
def tocsr(self, copy=False):
"""Converts the matrix to Compressed Sparse Row format.
Args:
copy (bool): If ``False``, it shares data arrays as much as
possible. Actually this option is ignored because all
arrays in a matrix cannot be shared in coo to csr conversion.
Returns:
cupyx.scipy.sparse.csr_matrix: Converted matrix.
"""
if self.nnz == 0:
return csr.csr_matrix(self.shape, dtype=self.dtype)
# copy is silently ignored (in line with SciPy) because both
# sum_duplicates and coosort change the underlying data
x = self.copy()
x.sum_duplicates()
cusparse.coosort(x, 'r')
x = cusparse.coo2csr(x)
x.has_canonical_format = True
return x
