matlab画圆的命令_matlab画圆命令资料

%%

圆环面

R=6;r=2;

symsuv;

ezmesh((R+r*cos(u))*cos(v),(R+r*cos(u))*sin(v),r*sin(u));

axisequal;

%%

圆盘

R=6;r=2;

theta=linspace(0,2*pi,90);ph=linspace(r,R,30);

[t,p]=meshgrid(theta,ph);

r=t*0;

[x,y,z]=pol2cart(t,p,r);

mesh(x,y,z);

axisequal;

%%a.

画椭球

a=1;b=2;c=3;

figure(1),title('

椭球

')

ellipsoid(0,0,0,a,b,c)

%

shadinginterp

boxon;

gridoff

colormaphsv

%%b.

单叶双曲面

[x,y]=meshgrid(-2:0.2:2,-2:0.2:2);

z=sqrt(c.^2*(x.^2/(a.^2)+y.^2/(b.^2)-1));

%

figure(2)

subplot(121),title('

单叶双曲面

')

surf(x,y,real(z))

holdon;

surf(x,y,-real(z))

%