Matlab畫動圖並保存成gif之一——AM調製

很多例子教程了，但是沒有subplot的例子。我用subplot畫了一個AM調製的顯示的動圖，並且保存。

主要是用到for的方法。代碼如下：

clear;
clf;
close all

t = linspace(0,3,200);

signal = sin(2*pi*0.5*t)*0.5+0.5;
carrier = sin(2*pi*5*t);
amWave = signal.*carrier;


h=figure
set(gcf,'Position',get(0,'ScreenSize'));
for i = 1:length(t)-2
    
    subplot(3,1,1);
    plot(t(i:i+1),signal(i:i+1),'b','LineWidth',2);
    axis([0,3,-1,1])
    title("\fontsize{14}原始信號")
    hold on
    drawnow
    
    subplot(3,1,2);
    plot(t(i:i+1),carrier(i:i+1),'r','LineWidth',2);
    axis([0,3,-1,1])
    title("\fontsize{14}載波")
    hold on
    drawnow
    
    subplot(3,1,3)
    plot(t(i:i+1),amWave(i:i+1),'r','LineWidth',2)
    axis([0,3,-1,1])
    hold on
    plot(t(i:i+1),signal(i:i+1),'b','LineWidth',2);
    title("\fontsize{14}調幅信號")
    hold on
    drawnow
    
    f=getframe(gcf);
    imind=frame2im(f);
    [imind,cm] = rgb2ind(imind,256);
    if i == 1
        imwrite(imind,cm,'AmModulation.gif','GIF', 'Loopcount',inf,'DelayTime',0.1);
    else
        imwrite(imind,cm,'AmModulation.gif','GIF','WriteMode','append','DelayTime',0.1);
    end
end