Module « scipy.linalg.interpolative »

Fonction estimate_spectral_norm - module scipy.linalg.interpolative

Signature de la fonction estimate_spectral_norm

def estimate_spectral_norm(A, its=20) 

Description

estimate_spectral_norm.__doc__

    Estimate spectral norm of a matrix by the randomized power method.

    ..  This function automatically detects the matrix data type and calls the
        appropriate backend. For details, see :func:`backend.idd_snorm` and
        :func:`backend.idz_snorm`.

    Parameters
    ----------
    A : :class:`scipy.sparse.linalg.LinearOperator`
        Matrix given as a :class:`scipy.sparse.linalg.LinearOperator` with the
        `matvec` and `rmatvec` methods (to apply the matrix and its adjoint).
    its : int, optional
        Number of power method iterations.

    Returns
    -------
    float
        Spectral norm estimate.