animated sine wave continously

Question

nirwana 2023-3-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1938319-animated-sine-wave-continously

评论： Les Beckham 2023-3-31

采纳的回答： Les Beckham

在 MATLAB Online 中打开

Hi alll, i'd like to make sine wave with three variation and walk continously, but i end up make it uncontinously,

here the script that i modified, any suggestion to solve it?

TIA

close all
subplot(1,2,1)
t = 0:0.01:10*pi;
phase=pi;
y = cos(t+phase);
yH=hilbert(y);
for j = 1:length(t) 
    hold on 
    plot(t,y) 
    plot(t,0.5*imag(yH))
    plot(t,y+imag(yH))
    hold off
    axis([0 8*pi -2 2])   % moving 2 cycles would mean the end would be 4pi + 2*2pi = 8pi 
                          % you can keep the axis endpoints according to your need 
    grid on 
    pause(0.1) 
    %hold on 
     if j ~= length(t) 
        clf 
     end 
    t = t + 0.1;  % used 0.1 increment as elements in t have 0.1 difference 
                  % Also, as y is already defined earlier, this change in t will not change y   
end;

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Adam Danz 2023-3-30

@nirwana, creating an animation by iteratively calling plot() is very inefficient. In your demo, three lines are created and and eliminated over 3000 times. Instead, re-use the same line(s) and update the values on each iteration. @Les Beckham demonstrates this in the answer below.

Another approach is to use animatedline.

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