ex4_24.m

源代码集合

[x,y] = meshgrid(-3:0.1:3,-2:0.1:2);
z=(x.^2-2*x).*exp(-x.^2-y.^2-x.*y);

for i=1:2, for j=1:2
   eval(['subplot(22' int2str((i-1)*2+j) ')'])
   mesh(x,y,z); axis([-3,3,-2,2,-0.7,1.5])
end, end
subplot(221), surf(x,y,z); shading flat; axis([-3,3,-2,2,-0.7,1.5])
view(0,90), title('view(0,90)')
subplot(222), view(90,0), title('view(90,0)')
subplot(223), view(0,0), title('view(0,0)')
subplot(224),  title('normal viewpoint')

for i=1:2, for j=1:2
   eval(['subplot(22' int2str((i-1)*2+j) ')'])
   surf(x,y,z); shading interp, axis([-3,3,-2,2,-0.7,1.5]), 
end, end
subplot(221), view(0,90), title('view(0,90)')
subplot(222), view(90,0), title('view(90,0)')
subplot(223), view(0,0), title('view(0,0)')
subplot(224),  title('normal viewpoint')

subplot(221), contour(x,y,z,30)
subplot(222), y1=-2:0.1:2; plot(y1,z'); axis([-3 3 -0.7,1.5])
subplot(223), x1=-3:0.1:3; plot(x1,z); axis([-2 2 -0.7,1.5])
subplot(224), mesh(x,y,z); axis([-3 3 -2 2 -0.7 1.5])