Let me be the ith person to point to the exceptionally useful ggplots2 package in R. Its default plot settings (as in qplot() ) make for some particularly nice figures.
However, I bring it up now because it provides a slightly more flexible method of rotating axis labels (different from the method used here). GGplot can be a little complicated at first glance (I recommend this nice tutorial) but trust me, it is well worth the investment in time. Below is the creation of a simple histogram using qplot. Note that qplot is stored in an object and then called with “+ opts( )” to tweak the particular settings of interest. It is actually this second command which draws the plot.