clf
[x,y,z]=textread('h:\chwila\ts\MatLab\siatka.dat','%f%f%f','delimiter',',');
[x1 y1]=meshgrid(min(x):max(x),min(y):max(y));

z1(:,1)=z(1:6);
z1(:,2)=z(7:12);
z1(:,3)=z(13:18);
z1(:,4)=z(19:24);
z1(:,5)=z(25:30);
z1(:,6)=z(31:36);
surf(x1,y1,z1)
shading interp