title: R ggplot2 wrap long x-axis labels over multiple rows
body: <p>I have a bar chart (I used ggplot2, geom_bar), but the labels for x-axis are too long and overlap. I would like to keep them as long as they are, but I also would like them to be horizontally (not vertically, nor with an angle). Is there some way to wrap the long labels over multiple (at least two) rows?</p>