scipy.linalg.interpolative.reconstruct_skel_matrix#
- scipy.linalg.interpolative.reconstruct_skel_matrix(A, k, idx)[source]#
Reconstruct skeleton matrix from ID.
The skeleton matrix can be reconstructed from the original matrix A and its ID rank and indices k and idx, respectively, as:
B = A[:,idx[:k]]
The original matrix can then be reconstructed via:
numpy.hstack([B, numpy.dot(B, proj)])[:,numpy.argsort(idx)]
See also
reconstruct_matrix_from_id
andreconstruct_interp_matrix
.- Parameters:
- A
numpy.ndarray
Original matrix.
- kint
Rank of ID.
- idx
numpy.ndarray
Column index array.
- A
- Returns:
numpy.ndarray
Skeleton matrix.