Changing xlim & ylim of axes sluggish

2 Ansichten (letzte 30 Tage)
Dan
Dan am 18 Dez. 2013
Kommentiert: Dan am 20 Dez. 2013
I implemented my own pan & zoom functionality which adjusts the xlim & ylim of an axes as the user moves the mouse. Although this works OK, it's a bit sluggish & "laggy". I'm guessing that the data coming from the mouse is overwhelming the systems ability to change the axes properties.
Does this sound reasonable? If so, does the axes have a "busy updating" flag I can test? Or is there some other explanation?
Any ideas?
TIA
Dan
  3 Kommentare
Dan
Dan am 18 Dez. 2013
A lot! ;-) I neglected to mention that the axes contains an image.
José-Luis
José-Luis am 18 Dez. 2013
That might the source of your problem. The image is re-plotted every time you refresh your axes. Please try with fewer data to see if that's the problem.

Melden Sie sich an, um zu kommentieren.

Antworten (2)

David Sanchez
David Sanchez am 18 Dez. 2013
You have too many processes trying to run at the same time. Even when it sounds incoherent, insert a very short pause right after reading the mouse position
pause(0.0001);
That will refresh the buffer ( or something like that ) and the graphics will be plotted less "laggy".
  1 Kommentar
Dan
Dan am 19 Dez. 2013
I think we are both close to the answer.... but not quite there. I'm actually doing this inside GUIDE so I'm not certain where to put this pause. I tried putting it on the first line inside the function that gets triggered when the mouse moves (WindowButtonMotionFcn) but it didn't seem to do much. In fact.... it almost feels like this would make things worse but I'm not certain. Maybe I need a careful insertion of "drawnow"? This is tricky.

Melden Sie sich an, um zu kommentieren.


Kelly Kearney
Kelly Kearney am 20 Dez. 2013
Not sure if this is exactly the effect you're going for, but for panning around an image via mouse movement, I've found this function: zoom2cursor to be very well-done, and I've used that code as a template to pan around some very large images without any noticeable latency.
  1 Kommentar
Dan
Dan am 20 Dez. 2013
Thanks for the info on zoom2cursor. I'm both pleased and disappointed that the function seems to have similar laggy/jerky behavior. (Pleased because Brett knows his stuff so I'm doing something right). So... I'm thinking it's perhaps either my computer or perhaps I need to play with the "interruptible" and/or "busy action" properties of the axes.
Thanks again
Dan

Melden Sie sich an, um zu kommentieren.

Kategorien

Mehr zu Graphics Performance finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by