Solving 2D poissio's equation by gauss seidal method

This program solves the 2D poission's equation by gauss seidal method.

% This program solves the 2D poission's equation by gauss seidal method.
%It solves the equation in the form d2u/dx2+d2u/dy2=f2(x,y) .f2.m is the second derivative function.
% g is the boundary conditions function
clear;