SciPy

This is documentation for an old release of SciPy (version 1.5.4). Read this page in the documentation of the latest stable release (version 1.15.0).

scipy.sparse.dia_matrix.nonzero

dia_matrix.nonzero(self)[source]

nonzero indices

Returns a tuple of arrays (row,col) containing the indices of the non-zero elements of the matrix.

Examples

>>>
>>> from scipy.sparse import csr_matrix
>>> A = csr_matrix([[1,2,0],[0,0,3],[4,0,5]])
>>> A.nonzero()
(array([0, 0, 1, 2, 2]), array([0, 1, 2, 0, 2]))

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