y_z_jiao_space1.m

一个小小的c语言编程

function y_z_jiao_space1
global X1 X2 X3 b
L1=X1<-(b-1)/2;    %鞍点
a1=L1.*X2;a2=L1.*X3;
figure(10),h1=title('焦点'); 
plot(a1,a2,'.'),