numpy.isfortran#

numpy.isfortran(a)[source]#

Check if the array is Fortran contiguous butnot C contiguous.

This function is obsolete. If you only want to check if an array is Fortrancontiguous usea.flags.f_contiguous instead.

Parameters:

andarray

Input array.

Returns:

isfortranbool

Returns True if the array is Fortran contiguous butnot C contiguous.

Examples

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np.array allows to specify whether the array is written in C-contiguousorder (last index varies the fastest), or FORTRAN-contiguous order inmemory (first index varies the fastest).

>>>importnumpyasnp>>>a=np.array([[1,2,3],[4,5,6]],order='C')>>>aarray([[1, 2, 3],       [4, 5, 6]])>>>np.isfortran(a)False

>>>b=np.array([[1,2,3],[4,5,6]],order='F')>>>barray([[1, 2, 3],       [4, 5, 6]])>>>np.isfortran(b)True

The transpose of a C-ordered array is a FORTRAN-ordered array.

>>>a=np.array([[1,2,3],[4,5,6]],order='C')>>>aarray([[1, 2, 3],       [4, 5, 6]])>>>np.isfortran(a)False>>>b=a.T>>>barray([[1, 4],       [2, 5],       [3, 6]])>>>np.isfortran(b)True

C-ordered arrays evaluate as False even if they are also FORTRAN-ordered.

>>>np.isfortran(np.array([1,2],order='F'))False

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