ptypy.utils.math_utils.delxc#

ptypy.utils.math_utils.delxc(a, axis=-1)#

Central first order derivative for finite difference calculation.

Note

Forward and backward derivatives are used for first and last elements along the derivative direction.

Pixel units are used (\(\Delta x = \Delta h = 1\)).

Parameters:

a (nd-numpy-array) – Input array.
axis (int, Default=-1, optional) – Which direction used for the derivative.

Returns:

out – Derived array.

Return type:

nd-numpy-array