matplotlib – increase resolution to see details

I managed to do so, on Evert’s advice, by using a very big resolution with a very small font. Here are the most important steps:

import pylab as pl
pl.figure(figsize=(70, 70)) # This increases resolution
pl.savefig('test.eps', format="eps", dpi=900) # This does, too
pl.annotate(..., fontsize="xx-small", ...)