Thread Subject: Gradient of Solution

Dear All,

I have a solution from my 2D FEM and want to compute the gradient
of the solution.This is helpful especially in Imaging.I tried the Gradient
function in matlab and realised,it's based on Finite Differencing.Any
tips or ideas on how to find Gradient of FEM solution say U.

This is what i tried:

U = A\B;
W= Gradient(U)