matlab求2曲线交点(含参数)
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发布时间：2022-04-24 21:26
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时间：2023-10-11 18:19
clc;clear;close all;
t=0:0.01:pi;
x=sin(3*t).*cos(t);
y1=2*x-0.5;
y2=sin(3*t).*sin(t);
plot(t,y1,t,y2);grid;
delta_y=y1-y2;
% figure;stem(delta_y);
j=1;
for i=1:length(t)-1
if delta_y(i)*delta_y(i+1)<0
position(j)=i+1;
j=j+1;
end
end
hold on;
plot(t(position),y1(position),'ro');
title('两条曲线相交');
xlabel('x');ylabel('y');
h = legend('y1','y2');
