This is documentation for an old release of SciPy (version 1.5.3). Read this page in the documentation of the latest stable release (version 1.15.1).
scipy.sparse.lil_matrix.nonzero¶
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lil_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]))