Question

怎么用Matlab求交线

Answer 1

假如，平面x-y+z=1与柱面x^2+y^2=1交线
syms x y z
[y,z]=solve('x-y+z=1','x^2+y^2=1','y','z');
x=-1:0.05:1;
y=subs(y,x);
z=subs(z,x);
plot3(x,y,z)
先用solve求出y和z关于x的表达式；在对x,y,z赋值求得其向量；然后作图