examp2_24.m

matlab的大量实例代码

[x,y] = meshgrid(-3:0.1:3,-2:0.1:2);
z=(x.^2-2*x).*exp(-x.^2-y.^2-x.*y);
ii=(x<=0)&(y<=0); z1=z; z1(ii)=NaN;
surf(x,y,z1), shading flat; axis([-3 3 -2 2 -0.7 1.5])