file = fopen ( 'gitter.txt', 'r' );
npt = cell2mat ( textscan ( file, '%d,%d', 1 ) );
np = npt ( 1 ); nt = npt ( 2 );
TX = cell2mat ( textscan ( file, '%f', np, 'delimiter', ',' ) );
TY = cell2mat ( textscan ( file, '%f', np, 'delimiter', ',' ) );
TH = cell2mat ( textscan ( file, '%f', np, 'delimiter', ',' ) );
TT = cell2mat ( textscan ( file, '%d,%d,%d', nt ) );
colormap ( winter );
h1 = subplot ( 121 );
trisurf ( TT, TX, TY, TH );
view ( 2 );
axis ( h1, 'square' );
h2 = subplot ( 122 );
trisurf ( TT, TX, TY, TH );
shading interp;
lighting phong;
light;
view ( -40, 80 );
axis ( h2, 'square' );