utils.arrays¶

Module: `utils.arrays`¶

Array utilities

nipy.utils.arrays.strides_from(shape, dtype, order='C')[source]¶

Return strides as for continuous array shape shape and given dtype

Parameters

shape : sequence

shape of array to calculate strides from

dtype : dtype-like

dtype specifier for array

order : {‘C’, ‘F’}, optional

whether array is C or FORTRAN ordered

Returns

strides : tuple

seqence length len(shape) giving strides for continuous array with given shape, dtype and order

Examples

>>> strides_from((2,3,4), 'i4')
(48, 16, 4)
>>> strides_from((3,2), np.float)
(16, 8)
>>> strides_from((5,4,3), np.bool, order='F')
(1, 5, 20)