utils.arrays

Module: utils.arrays

Array utilities

nipy.utils.arrays.strides_from(shape, dtype, order='C')

Return strides as for continuous array shape shape and given dtype

Parameters:

shapesequence

shape of array to calculate strides from

dtypedtype-like

dtype specifier for array

order{‘C’, ‘F’}, optional

whether array is C or FORTRAN ordered

Returns:

stridestuple

sequence 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.float64)
(16, 8)
>>> strides_from((5,4,3), np.bool_, order='F')
(1, 5, 20)