Two quick little issues I haven't been able to figure out how to fix on my own so far:
1. Is there an easy way to change the spacing between subplots, so that they aren't so crammed together? It's none too pretty when the x-axis text for the upper plot is overlapping or even below the title for the lower plot.
2. Is there a way to make the 'show()' command execute so that the script keeps running (instead of waiting for the windows to be closed), and to have the output persist past the end of the run?