plotmod.m

解决麦克斯韦的matlab源文件

function plotmod(mesh,vals,titstr)
% Creates a 3D surface plot of a vectorfield defined in the
% vertices of an unstructured mesh. 
% 
% mesh -> Data for 2D unstructured mesh
% vals -> column vector whose length must agree with mesh.Nv

if (size(vals,1) ~= 2*mesh.Nv), error('Size mismatch for argument vector'); end
if (size(vals,2) ~= 1), error('Vals must be a colun vector'); end
if (nargin < 3), titstr = 'Modulus of nodal vectorfield'; end

mods = sqrt((vals(1:2:2*mesh.Nv-1,1).^2+vals(2:2:2*mesh.Nv,1).^2));

hold on;
title(titstr);
trisurf(mesh.trv,mesh.vt(:,1),mesh.vt(:,2),mods);
shading interp;
hold off;