bundles / scipy 1.17.1 / scipy / linalg / interpolative / reconstruct_skel_matrix

function

`scipy.linalg.interpolative:reconstruct_skel_matrix`

source: /scipy/linalg/interpolative.py :617

Signature

def reconstruct_skel_matrix ( A , k , idx )

Summary

Reconstruct skeleton matrix from ID.

Extended Summary

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 and reconstruct_interp_matrix.

Parameters

A : :class:`numpy.ndarray`: Original matrix.
k : int: Rank of ID.
idx : :class:`numpy.ndarray`: Column index array.

Returns

: :class:`numpy.ndarray`: Skeleton matrix.

Aliases

scipy.linalg.interpolative.reconstruct_skel_matrix