Module « scipy.linalg »

Fonction find_best_blas_type - module scipy.linalg

Signature de la fonction find_best_blas_type

def find_best_blas_type(arrays=(), dtype=None) 

Description

find_best_blas_type.__doc__

Find best-matching BLAS/LAPACK type.

    Arrays are used to determine the optimal prefix of BLAS routines.

    Parameters
    ----------
    arrays : sequence of ndarrays, optional
        Arrays can be given to determine optimal prefix of BLAS
        routines. If not given, double-precision routines will be
        used, otherwise the most generic type in arrays will be used.
    dtype : str or dtype, optional
        Data-type specifier. Not used if `arrays` is non-empty.

    Returns
    -------
    prefix : str
        BLAS/LAPACK prefix character.
    dtype : dtype
        Inferred Numpy data type.
    prefer_fortran : bool
        Whether to prefer Fortran order routines over C order.

    Examples
    --------
    >>> import scipy.linalg.blas as bla
    >>> rng = np.random.default_rng()
    >>> a = rng.random((10,15))
    >>> b = np.asfortranarray(a)  # Change the memory layout order
    >>> bla.find_best_blas_type((a,))
    ('d', dtype('float64'), False)
    >>> bla.find_best_blas_type((a*1j,))
    ('z', dtype('complex128'), False)
    >>> bla.find_best_blas_type((b,))
    ('d', dtype('float64'), True)