Plotting performance reduced in APP
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I designed a GUI with Matlab 2019a App Designer tool for visualization of 3D segments and automatic labelling. The figure below shows an example of app.UIAxes component and then the script in my app is presented.
% when a push button is pressed
cla(app.UIAxes) % app.UIAxes contains other data to be cleared from the current figure
for i=1:half
% first point of the i-segment is stored in SEGMENTS(i,1:3)
% last point of the i-segment is stored in SEGMENTS(i+half,1:3)
% plot the current segment
line(app.UIAxes,[SEGMENTS(i,1),SEGMENTS(i+half,1)],...
[SEGMENTS(i,2),SEGMENTS(i+half,2)],...
[SEGMENTS(i,3),SEGMENTS(i+half,3)],'Color','k')
% label the current segment on its midpoint
x_mid=mean([SEGMENTS(i,1),SEGMENTS(i+half,1)]);
y_mid=mean([SEGMENTS(i,2),SEGMENTS(i+half,2)]);
z_mid=mean([SEGMENTS(i,3),SEGMENTS(i+half,3)]);
text(app.UIAxes,x_mid,y_mid,z_mid,num2str(i),'Color','b',...
'FontSize',12,'FontWeight','bold'), hold(app.UIAxes,'on');
end
hold(app.UIAxes,'off');
As stated in https://it.mathworks.com/matlabcentral/answers/252979-increase-the-plotting-performance-in-the-matlab-level-drawmode-optimizing-rendering-down-sampling, I used the function line instead of plot3. However, when interacting by 3D rotation, the figure in my app is much slower than the same plotted through Matlab command window (also with few segments, but it should work with hundreds of segments). In particular, I found that the lag is introduced when adding text labels, and this lag (increased in time duration) occurs on other PCs.
Any suggestion to overcome this issue and improve usability of my app?
Thanks in advance
2 个评论
Mohammad Sami
2020-1-17
You can try and avoid the for loop. That can make the plotting faster. Something like this might work
% half = floor(size(SEGMENTS,1)/2);
idx = 1:half;
sgx = [SEGMENTS(idx,1),SEGMENTS(idx+half,1)]';
sgy = [SEGMENTS(idx,2),SEGMENTS(idx+half,2)]';
sgz = [SEGMENTS(idx,3),SEGMENTS(idx+half,3)]';
line(app.UIAxes,sgx,sgy,sgz,'Color','k');
x_mid=mean(sgx);
y_mid=mean(sgy);
z_mid=mean(sgz);
text(app.UIAxes,x_mid,y_mid,z_mid,string(idx),'Color','b',...
'FontSize',12,'FontWeight','bold');
Luca Vacca
2020-1-17
采纳的回答
Yair Altman
2020-1-20
1 个投票
App Designer creates an HTML/JavaScript-based webpages (uifigures), which are noticably slower than the Java-based figures that are created when you run your script from the Matlab Command Window. Unfortunately, there is not much that you can do to improve uifigure performance except wait for newer Matlab releases.
However, if the nifty UI widgets that you can create with App Designer are not very important for you, you can create your graph in a standard (i.e. Java-based) figure, which will be much faster. In other words, simply copy the script that you ran in the Command Window into an m-file and then run that m-file as needed.
5 个评论
Adam Gogacz
2020-10-2
Yair, 2020b is no better, still subpar performance. Do you have any ideas what's causing the uifigures to be so sluggish?
Veronica Taurino
2022-5-2
编辑：Veronica Taurino
2022-5-2
2021b does not seem any better...
Hans Harms
2024-12-11
Here we are, end of 2024, and no improvement whatsoever. This performance is completely prohibitive.............
Yair Altman
2024-12-11
@Hans Harms have you tried it on R2024b? it should be noticably faster than back in 2020
Hans Harms
2024-12-12
2023b has no improvement whatsoever; and performance in 2024b is actually even worse. Trying to update 6 axes, and it takes a full second per axis right now to update figures that are ~300x300 pixels, each.
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