Compute horizontal and vertical derivatives

[QwillDune]

Hello,

If I understand correctly, you want to calculate gradients.

See this post

Calculating gradients

Hi I am wondering if Scilab has a built-in function similar to Python numpy.gradient, which takes an ‘edge-order’ … I can manually create a first-order gradient function in Scilab like this: function [grad]=dydx(y, x) k = length(x); grad = zeros(k); // initialize grad(1) = (y(2) - y(1))./(x(2) - x(1)); grad(k) = (y(k) - y(k-1))./(x(k) - x(k-1)); if k>2 then // for i = 2:k-1 do // grad(i) = ( (y(i+1) - y(i))./(x(i+1) - x(i)) + .. // …

BR
François