Why does my scatter plot take so long to plot, even though tic toc says the calculation is fast?

I have made a GUI that plots data as a scatter plot when the user hits a button on the GUI. I have profiled the callback using matlab profiler and its shows that it runs really fast (0.2 seconds). tic toc for the callback also shows it is fast. Why then does it take ~5 seconds for the plot on the GUI to show the scatter data? It seems to get slower and slower the more data there is, even though the profiled time for the callback only slightly increases with more data.

Answer 1

[Image Analyst]

Try putting a "drawnow" right after you want to force the display to refresh/update/repaint.