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scipy.linalg.blas.

# find_best_blas_type

scipy.linalg.blas.find_best_blas_type(arrays=(), dtype=None)

  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 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,))
      ('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)