Was wondering there's any programmers / people good with MATLAB on here who could help me.. i'm rather desperate. A crate of beer would be given to anyone who could help

I've got a 2D non-linear elliptical partial differential equation in the form

ux - uxx + uyy = 0

I need to solve using a finite difference scheme, with various dirichlet and neumann boundary conditions.

Tried using PDETOOL in Matlab but it uses FEM which is inconsistent with the other numerical schemes I'm using.

Cheers