Question

How can I use stripplot from the lattice package with a log y axis? With plot, I can use the argument log and specify which axes I want on a log-scale. Is there some way of doing this with stripplot without recourse to taking the log of the numeric data and then specifying the y axes points?

Example code using singer data:

stripplot(voice.part ~ height, data = singer, aspect = 1,
      jitter.data = TRUE, xlab = "Height (inches)")

NB. This data doesn’t need to be on a log scale, I’m just using it as an example

Answer 1

Fine tuning of the axes in plots with the lattice package are handled by the scales argument (see the appropriate entry on the ?xyplot page). This argument is essentially a list, and two of the list components can be x and y, which are also lists with components that control the appearance of the x- and y-axes, respectively.

For a log scale on the x axis, use

stripplot(voice.part ~ height, data = singer, aspect = 1,
      jitter.data = TRUE, xlab = "Height (inches)",
      scales = list(x = list(log = 2)))

Replace 2 with whatever log base you want.