SciPy

scipy.linalg.interpolative.reconstruct_interp_matrix

scipy.linalg.interpolative.reconstruct_interp_matrix(idx, proj)[source]

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:

numpy.dot(B, P)

See also reconstruct_matrix_from_id and reconstruct_skel_matrix.

Parameters :

idx : numpy.ndarray

Column index array.

proj : numpy.ndarray

Interpolation coefficients.

Returns :

:class:`numpy.ndarray` :

Interpolation matrix.