bundles / scipy 1.18.0 / scipy / linalg / blas / find_best_blas_type

function

`scipy.linalg.blas:find_best_blas_type`

source: /scipy/linalg/blas.py:289

Signature

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

Summary

Find best-matching BLAS/LAPACK type.

Extended Summary

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 numpy as np
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,))
bla.find_best_blas_type((a*1j,))
bla.find_best_blas_type((b,))

✓

('d', dtype('float64'), True)

Aliases

scipy.linalg.find_best_blas_type