求单叶双曲面和双叶双曲面、椭圆抛物面、双曲抛物面用matlab怎么画或其参数方程?
3个回答

花画圆的程序：

for i=-3:0.001:3

y=-sqrt(9-i^2);

plot(i,y);

hold on

end

hold on

for i=-3:0.001:3

y=sqrt(9-i^2);

plot(i,y);

hold on

end

%椭圆

for i=-6:0.01:6

y=-sqrt(36-i^2)/2;

plot(y,i);

hold on

end

%双曲线

for i=-6:0.01:6

y=-sqrt(36+i^2)/2;

plot(y,i);

hold on

end

hold on

for i=-6:0.01:6

y=sqrt(36+i^2)/2;

plot(y,i);

hold on

end

hold on

for i=-6:0.01:6

y=sqrt(36-i^2)/2;

plot(y,i);

hold on

end

%抛物线

for i=0:0.01:6

y=-sqrt(2*6*i);

plot(y,i);

hold on

end

hold on

for i=0:0.01:6

y=sqrt(2*6*i);

plot(y,i);

hold on

end

相关问题