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