Changes

A matplotlib graph is made, written to file and shown in a PsychoPy ImageStim. Then the graph is updated  

A matplotlib graph is made, written to file and shown in a PsychoPy ImageStim. Then the graph is updated  

and send directly to the ImageStim object to replace the old image. On the labcomputer this runs smoothly  

and send directly to the ImageStim object (without writing to file) to replace the old image. On the  

at 60Hz.

labcomputer this runs smoothly at 60Hz. This is a [https://www.socsci.ru.nl/wilberth/python/image/psychopy-matplotlib.ogv video] of the demo. Note that the video is not as smooth as the demo.

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