ginput slow when plotted a lot of points
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Hi, i'm experiencing a strange behaviour of the ginput command.
I plotted on an axis quite a huge number of points (more than 4 millions). Everything behaves quickly (pan and zooming are fast).
When i run a ginput on this axis it becomes painfully slow. The crosshair-like pointer is lagged (it follows the actual position of the mouse with a delay of some seconds).
the only solution i found so far is to overlay a transparent axis over the real one, with the same extents, and run the ginput over this second one.
This solution actually works but is really slow to code (i often have to do it) and could cause some problems (e.g in case of zooming it's quite difficult to keep the axis aligned).
In general i don't think this solution is elegant, so my question is:
did anyone else experience the same problem and find a better solution or workaround?
Thanks!
Marco
1 commentaire
Paolo
le 14 Août 2013
Hi Marco, could you please write the lines of code that you used to overlay a transparent axis with aligned axes? I'm experiencing the same problem with ginput...
Thanks, Paolo
Réponses (3)
Walter Roberson
le 29 Sep 2011
linkaxes() should keep the axes aligned.
If you have to code it often, then it would seem natural to code the repeated elements in to functions and then just call upon them ?
Marijan Herak
le 2 Mar 2018
Try choosing OpenGL renderer for the figure - set(gcf,'renderer','opengl'). It works for me, and ginput is smooth and responsive again (over 100.000 points in the figure).
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Marco
le 4 Oct 2011
2 commentaires
Walter Roberson
le 4 Oct 2011
Perhaps you could simply turn hittest off in the properties of the handles for the points?
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