scipy.linalg.interpolative.

reconstruct_interp_matrix

scipy.linalg.interpolative.reconstruct_interp_matrix(idx, proj)

Reconstruct interpolation matrix from ID.

The interpolation matrix can be reconstructed from the ID indices and coefficients idx and proj, respectively, as:

P = numpy.hstack([numpy.eye(proj.shape[0]), proj])[:,numpy.argsort(idx)]

The original matrix can then be reconstructed from its skeleton matrix B via A = B @ P

See also reconstruct_matrix_from_id and reconstruct_skel_matrix.

Parameters:

idxnumpy.ndarray

1D column index array.

projnumpy.ndarray

Interpolation coefficients.

Returns:

numpy.ndarray

Interpolation matrix.