matlab如何在圆域上绘制函数z=x^2-y^2(马鞍面）

Answer 1

-1.5:0.1:1.5;
y=-1.5:0.1:1.5;
[X,Y]=meshgrid(x,y);
Z=0.5*(X.^2/a-Y.^2/b);
surf (X,Y,Z);title('双曲抛物面');

椭球面：
theta=0:0.1:2*pi;
phi=theta';
a=8;b=10;c=5;
X =a*cos(phi)*cos(theta);
Y =b*cos(phi)*sin(theta);
Z =c*sin(phi)*ones(size(theta));
surf(X,Y,Z);title('椭球面');

椭圆抛物面：
a=10;
b=10;
x=-1.5:0.1:1.5;
y=-1.5:0.1:1.5;
[X,Y]=meshgrid(x,y);
Z=0.5*(X.^2/a+Y.^2/b);
surf (X,Y,Z);title('椭圆抛物面');

马鞍面：
a=10;
b=10;
x=-1.5:0.1:1.5;
y=-1.5:0.1:1.5;
[X,Y]=meshgrid(x,y);
Z=X.^2/a-Y.^2/b;
surf (X,Y,Z);title('马鞍面');

Answer 2

[x,y]=meshgrid(-6:0.5:6);
z1=x.^2-y.^2;
figure(1),meshz(x,y,z1)
colormap([0,0,1])
z2=x.*y;
figure(2),meshz(x,y,z2)
colormap([0,0,1])

Answer 3

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Answer 4

UESTC数学实验？？？？？？