MATLAB Answers


Can I speed up this iterative ploting?

Asked by Sinwoo Jeong on 22 Oct 2018
Latest activity Commented on by Sinwoo Jeong on 22 Oct 2018
Accepted Answer by KSSV
I need to plot a graph iteratively. (about 10000 times)
One plot consists of a number of sub-plotting as follows.
hold on
u_deformed = rand(54, 24);
w_deformed = rand(54, 24);
for i = 1:size(u_deformed, 1)
plot(u_deformed(i, :), w_deformed(i, :),'b','linewidth', 8)
Here, the size of the matrix [u_deformed] and [w_deformed] are 54X24, respectively.
This plot is for drawing a deformed shape of a structure at a certain time step. For each time step, the matrix [u_deformed] and [w_deformed] are changed.
It takes about 0.04 sec for one set of plotting. But, the problem is I need to do it for about 10000 times.
It means it would take 0.04*10000 sec. This is quite problematic for me.
I tried to use parfor for this plotting. But it made the speed even slower.
I want to know whether there is a way for plotting whole this data without for-loop statement.


What is wrong when you reduce the iteration?
on 22 Oct 2018
Why you are going for plot when you have a matrix? YOu should use surf eh.

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1 Answer

Answer by KSSV
on 22 Oct 2018
 Accepted Answer

You should try using set. Check the below pseudo code:
h = plot(rand(10,1)) ;
for i = 1:10

  1 Comment

Thank you. 'set' is much faster than re-plot.

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