Hacking Boxplots
Usually the big nuisance with boxplots is accomodating the labels, which are usually too long. I suggest to keep the boxplots vertical, turn all the labels to perpendicular to axis, and increase the outer margin on the x-labels side.
x11 () par (omd = c (0, 1, 0.1, 1)) boxplot (<#...>, names = <#x_labels>, las = 2)
omd parameters are:
- width (parallel to x axis), left side
- width (parallel to x axis), right side
- height (parallel to y axis), bottom
height (parallel to y axis), top
las values are:
- 0: always parallel to the axis [default],
- 1: always horizontal,
- 2: always perpendicular to the axis,
3: always vertical.
For a general reference, look at the par help page.