% visualizing solutions on unstructured meshes can be a pain.
% here is an example which might help you in matlab.  If your
% department has a license for Tecplot, you might try it, too.
% (I don't think the math dept has a Tecplot license, though.)

x = rand(1,100)-.5;
y = rand(1,100)-.5;
z = zeros(1,100);
c = x.*x - y.*y;
tri = delaunay(x,y);

trisurf(tri,x,y,z,c);
shading interp;
view(0,90);
axis square;

hold on;
h = trimesh(tri,x,y,z,z,'EdgeColor',[0 0 0],'FaceAlpha',0);
hold off;
