I have never used R, but why (in the beginning) would you generate data in python and then plot in R, rather than just plot in python (which looks much nicer IMO)?
I remember looking at that matplotlib page for the first time and coming away thinking those graphs look a lot better and sharper than the default R ones. However, I found the reason for that is the images on that page are quite high resolution PNGs. If you make graphs of 200dpi or more in R, they look equally good. The annoying thing though is that you have to adjust all the margins and character size settings in R to plot at a higher resolution.
