How do I do multi animated lines in one axes?
50 views (last 30 days)
Show older comments
I need to do two multi animated lines in one axes.Is there any solution to this problem? As picture shows: This picture use "plot" ,but It's slowly when close to the end. And the matlab give a suggestion :use animatline to instead the plot function.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/156069/image.jpeg)
0 Comments
Accepted Answer
Thorsten
on 30 Aug 2016
Edited: Thorsten
on 30 Aug 2016
Just create a second animatedline and use addpoints:
numpoints = 100000;
x = linspace(0,4*pi,numpoints);
y = sin(x);
y2 = cos(x);
figure
h = animatedline;
h2 = animatedline;
axis([0,4*pi,-1,1])
for k = 1:numpoints
addpoints(h,x(k),y(k))
addpoints(h2,x(k),y2(k))
drawnow update
end
4 Comments
Koen
on 17 Nov 2020
I want to add animatedlines programmatically rather than using h1, h2, h3... (number of lines depends on certain input arguments in code)
h(1:num_lines) = animatedline
creates an animatedline array. I'm trying to access these in a loop where data is updated by doing something like
for x = 1:10
for i = 1:num_lines
y = i*x;
addpoints(h(i),x,y)
end
end
Intuitively, I would expect this code to create straight lines with different slopes. However this does not seem to work this way: it creates a single line (instead of num_lines), concatenating values h(1:num_lines). Is it possible to use animatedline in a similar way; using indices to feed data?
More Answers (2)
Le Dung
on 15 Dec 2017
Edited: Le Dung
on 15 Dec 2017
I suggest to you another approach, i think it is familiar to anyone. You can use "hold on" after "figure" And, of course, at the moment, "update" in "drawnow is no need. I will use example that Thorsten is given. Of course, to reduce cost time, i use 1000 to replace for 100000.
numpoints = 1000;
x = linspace(0,4*pi,numpoints);
y = sin(x);
y2 = cos(x);
figure
hold on % To hold this figure.
h = animatedline;
h2 = animatedline;
axis([0,4*pi,-1,1])
for k = 1:numpoints
addpoints(h,x(k),y(k))
addpoints(h2,x(k),y2(k))
drawnow % "update" is no need for this case
end
See Also
Categories
Find more on Animation in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!