Why is plot3 slow when I use it in a loop?
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I create plot3 in gui axes, if the number of elements that the many depictions of the process is very slow, if you can provide solutions
for i=1:length(AX(:,1))
plot3(AX(i,:),AZ(i,:),AY(i,:),'-c','LineWidth',0.25);
hold on
plot3(AXD(i,:),AZD(i,:),AYD(i,:),'-g','LineWidth',0.5);
end
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Answers (2)
Andrew Newell
on 8 Jun 2011
You could try using line instead of plot3. You'll have to make sure all your options come in pairs, e.g.,
line(AX(i,:),AZ(i,:),AY(i,:),'LineStyle','-','Color','c','LineWidth',0.25);
EDIT: With the data you provided, I tried these commands and it worked fine.
for i=1:size(AX,2)
line(AX(i,:),AZ(i,:),AY(i,:),'LineStyle','-', ...
'Color','c','Marker','.','LineWidth',1)
line(AXD(i,:),AZD(i,:),AYD(i,:),'LineStyle','-', ...
'Color','g','Marker','.','LineWidth',1)
end
On my machine this is 4 times faster than using the code you provided. Note that when you use line the image is saved by default, so you don't need hold on.
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Walter Roberson
on 8 Jun 2011
You only need to execute the "hold on" once; after that it is set and becomes a waste of time.
At some point, you are going to exceed the amount of memory that your graphics card has easily available; things will slow down then.
You could experiment with switching renderers.
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