def iddr_id(A, k):
"""
Compute ID of a real matrix to a specified rank.
:param A:
Matrix.
:type A: :class:`numpy.ndarray`
:param k:
Rank of ID.
:type k: int
:return:
Column index array.
:rtype: :class:`numpy.ndarray`
:return:
Interpolation coefficients.
:rtype: :class:`numpy.ndarray`
"""
A = np.asfortranarray(A)
idx, rnorms = _id.iddr_id(A, k)
n = A.shape[1]
proj = A.T.ravel()[:k*(n-k)].reshape((k, n-k), order='F')
return idx, proj
def iddr_id(A, k):
"""
Compute ID of a real matrix to a specified rank.
:param A:
Matrix.
:type A: :class:`numpy.ndarray`
:param k:
Rank of ID.
:type k: int
:return:
Column index array.
:rtype: :class:`numpy.ndarray`
:return:
Interpolation coefficients.
:rtype: :class:`numpy.ndarray`
"""
A = _asfortranarray_copy(A)
idx, rnorms = _id.iddr_id(A, k)
n = A.shape[1]
proj = A.T.ravel()[:k*(n-k)].reshape((k, n-k), order='F')
return idx, proj