From - Tue Dec  8 08:14:34 1998
>From lnolson  Mon Dec  7 16:12:44 1998
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Date: Mon, 07 Dec 1998 16:12:43 -0600
From: Luke Olson <lnolson@math.uiowa.edu>
Organization: University of Iowa
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To: David Stewart <dstewart@math.uiowa.edu>
Subject: Re: mk_nxt_tri.m
References: <366BE02A.48E7099A@math.uiowa.edu> <366BE62F.6CDAF5D9@math.uiowa.edu>
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Dr. Stewart,
I figured out how to plot these for the triangulation in test case 2. 
It works well and looks very cool:
%
%  This can be put at the end of the program when
%  you have the value for each point of the triangulation
%
%  U is the FEM solution at a given vertex
%
%  scatter3 is used in order to see the point better and
%    it fixes the axes
%
%  patch uses x,y,z and then a color.  V just says shade 
%    according to the height  

scatter3(vertices(:,1),vertices(:,2),U);
hold on;
%
for i=1:length(triangles(:,1))
  for j=1:3
    vx(j)=vertices(triangles(i,j),1);
    vy(j)=vertices(triangles(i,j),2);
    V(j)=U(triangles(i,j));
  end
  patch(vx,vy,V,V);
end

Hope this works for yours too,

--Luke