How can i draw two animated plots on each subplots at the same time?

Question

Le Dung 2017-12-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373058-how-can-i-draw-two-animated-plots-on-each-subplots-at-the-same-time

回答： Riccardo Rosati 2018-6-4

Hi everyone! Now, i want to draw two animated plots on each subplots at the same time. You can see my code below. But, when i use this code, of course, Matlab will return two subplots and it will draw "k" line after drew "r" line. So, how can i do to draw two animated plots (in this case is two lines) at the same time? Thank you so much. My code:

x1=linspace(0,20,201);
y1=sin(x1);
x2=linspace(0,20,201);
y2=cos(x2);
sub1=subplot(2,1,1);
hold on
axis([0 21 -1.1 1.1]); 
ani1=animatedline('Color','r');
for i=1:length(x1)
    addpoints(ani1,x1(i),y1(i));
    drawnow
    pause(0.01);
end
subplot(2,1,2)
hold on
axis([0 21 -1.1 1.1]); 
ani2=animatedline('Color','k');
for j=1:length(x1)
    addpoints(ani2,x1(j),y1(j))
    drawnow
    pause(0.01);
end

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Answer 1

Jos (10584) 2017-12-15

3
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373058-how-can-i-draw-two-animated-plots-on-each-subplots-at-the-same-time#answer_296363

在 MATLAB Online 中打开

Merge the for-loops! This works here because x1,y1, x2, and y2 are all the same length. There is also no need for hold on)

x1=linspace(0,20,201);
y1=sin(x1);
x2=linspace(0,20,201);
y2=cos(x2);
sub1=subplot(2,1,1);
axis([0 21 -1.1 1.1]); 
ani1=animatedline('Color','r');
subplot(2,1,2)
axis([0 21 -1.1 1.1]); 
ani2=animatedline('Color','k');
for k=1:length(x1)
    addpoints(ani1,x1(k),y1(k)) ;
    addpoints(ani2,x2(k),y2(k)) ;% I assume you meant to plot (x2,y2)
    drawnow
    pause(0.01);
end

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Jos (10584) 2017-12-15

在 MATLAB Online 中打开

I assume there is a relationship between x1 and x2? For instance, both are time points. You can use interp1 to get, for instance, y2 values for each point in x1, like this:

x1 = linspace(0,20,200)
y1 = sin(x1) ;
x2 = linspace(0,20,100)
y2 = cos(x2) ;
y2_int = interp1(x2,y2,x1) ;

and now use x1 as the x coordinate for both animations.

Le Dung 2017-12-15

It is very kind of you. Thank you so much. And, you can help me to my question on this link: https://www.mathworks.com/matlabcentral/answers/373112-how-can-i-specify-which-subplot-that-i-want-to-plot-on-it

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Answer 2

Riccardo Rosati 2018-6-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373058-how-can-i-draw-two-animated-plots-on-each-subplots-at-the-same-time#answer_323079

If I create the number of subplot iteratively (because this is for a GUI where I manually insert the number of signals that I want to plot), how can I do this? I should generate iteratively also the animated lines, but how?

Thanks in advance for the reply.