[Matplotlib-users] speeding up imshow

[G J. <gle...@gm...>]

Hello,
I want to use imshow to make a real time waterfall plot. The attached
code is the core of my application, and it works, but it is quite
slow, around 200ms to update the plot. Is there a way to accelerate
this? I have seen the blitting demos, and they work well for the line
plots, but I could not figure out how to extend this functionality to
imshow plots. In theory I could throw all of my data into a bitmap
(since I don't really need the antialiasing etc provided by AGG) and
display that directly in WX, but the trouble with that is I want to
display the spectra at a given time and the waterfall plot with the
same X axis, thus computing the area to display the bitmap seems
tricky. Is there any built in MPL functionality for doing that?
One question about the blitting demos: they do not seem to work well
with resizing the window (which make sense because the blit buffer
never gets informed of the window size change). Has anyone modified
this code to allow it to work with resizing? I tried to connect to the
RESIZE event and recapture the base canvas, but did not have any luck.
Thanks,
Glenn