How can I find intersections of curves?

Question

Rengin 2015-6-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223558-how-can-i-find-intersections-of-curves

回答： Star Strider 2015-6-12

    clear all
    clc
    Reactive_QCP1=[6.708;6.396;6.0911;5.791;5.498;5.210;4.926;4.647;4.371];
    Reactive_QCP2= [17.053;13.255;9.590;6.0533;2.632;-0.683;-3.903;-7.034;-10.083];
    ReactiveChange=(-40:10:40)';
    Graph_1=plot(Reactive_QCP1(:,1),ReactiveChange(:,1),'b');
    grid on
    hold on
    Graph_2=plot(Reactive_QCP2(:,1),ReactiveChange(:,1),'r');
    xlabel('Reactive Power Change of WF [p.u]');
    ylabel('QCPs [Mvar]');
    Graph_3=line([-15 20],[0 0],'color','k');
    hleg2=legend('QCP1','QCP2','Location','NorthEastOutside');
    % I want to see the coordinates where Graph_1 and Graph_3 intersect.
    % How can I do that? Thanks a lot