Module « scipy.sparse.linalg »

Fonction factorized - module scipy.sparse.linalg

Signature de la fonction factorized

def factorized(A) 

Description

factorized.__doc__

    Return a function for solving a sparse linear system, with A pre-factorized.

    Parameters
    ----------
    A : (N, N) array_like
        Input.

    Returns
    -------
    solve : callable
        To solve the linear system of equations given in `A`, the `solve`
        callable should be passed an ndarray of shape (N,).

    Examples
    --------
    >>> from scipy.sparse.linalg import factorized
    >>> A = np.array([[ 3. ,  2. , -1. ],
    ...               [ 2. , -2. ,  4. ],
    ...               [-1. ,  0.5, -1. ]])
    >>> solve = factorized(A) # Makes LU decomposition.
    >>> rhs1 = np.array([1, -2, 0])
    >>> solve(rhs1) # Uses the LU factors.
    array([ 1., -2., -2.])