幾種三維圖畫法

n=100;
a=1;
b=1;
x=linspace(-4,4,n);
y=linspace(-4,4,n);
[xx,yy]=meshgrid(x,y);
zz=(sin(pi*xx/a)./((pi*xx)/a)).*(sin(pi*yy/b)./((pi*yy)/b));
plot3(xx,yy,zz);
hidden off
text(4,5,0.9,'z=sinc(x,y)')

n=100;
a=1;
b=1;
x=linspace(-4,4,n);
y=linspace(-4,4,n);
[xx,yy]=meshgrid(x,y);
zz=(sin(pi*xx/a)./((pi*xx)/a)).*(sin(pi*yy/b)./((pi*yy)/b));
mesh(xx,yy,zz);
hidden off
text(4,5,0.9,'z=sinc(x,y)')

n=100;
a=1;
b=1;
x=linspace(-4,4,n);
y=linspace(-4,4,n);
[xx,yy]=meshgrid(x,y);
zz=(sin(pi*xx/a)./((pi*xx)/a)).*(sin(pi*yy/b)./((pi*yy)/b));
surf(xx,yy,zz);
hidden off
text(4,5,0.9,'z=sinc(x,y)')