def tocoo(self, copy=True):
"""Return a COOrdinate representation of this matrix
When copy=False the index and data arrays are not copied.
"""
major_dim, minor_dim = self._swap(self.shape)
data = self.data
minor_indices = self.indices
if copy:
data = data.copy()
minor_indices = minor_indices.copy()
major_indices = np.empty(len(minor_indices), dtype=np.intc)
sparsetools.expandptr(major_dim, self.indptr, major_indices)
row, col = self._swap((major_indices, minor_indices))
from coo import coo_matrix
return coo_matrix((data, (row, col)), self.shape)
def tocoo(self,copy=True):
"""Return a COOrdinate representation of this matrix
When copy=False the index and data arrays are not copied.
"""
major_dim,minor_dim = self._swap(self.shape)
data = self.data
minor_indices = self.indices
if copy:
data = data.copy()
minor_indices = minor_indices.copy()
major_indices = np.empty(len(minor_indices), dtype=np.intc)
sparsetools.expandptr(major_dim,self.indptr,major_indices)
row,col = self._swap((major_indices,minor_indices))
from coo import coo_matrix
return coo_matrix((data,(row,col)), self.shape)