[R] working with groups of labels?

[Richard.Cotton at hsl.gov.uk]

It seems that the structure of your data is that you have two groups 
("Real Bad Stuff" and "Other Crazy Things") which are then subdivided into 
further categories.  I'd be tempted to set your data up like this:

dfr <- data.frame(
   score=c(23, 14, 17, 8, 43, 13),
   group=rep(c("Real Bad Stuff", "Other Crazy Things"), each=3),
   variable=c("Real","Bad","Stuff","Other","Crazy","Things"))

Then you can use a lattice plot to emphasise the different groups, and 
avoid your mtext worries.

library(lattice)
barchart(
   variable~score|group, 
   data=dfr, 
   horizontal=TRUE,
   layout=c(1,2),
   scales=list(y=list(relation="free")),
   prepanel=function(x,y,...)
   {
      y <- y[,drop=TRUE]
      prepanel.default.bwplot(x,y,...)
   }, 
   panel=function(x,y,...)
   {
      y <- y[,drop=TRUE]
      panel.barchart(x,y,...)
   }
)

(The scales, prepanel and panel arguments are just to get rid of the 
variables that appear in one group but not the other.)  I realise it isn't 
exactly what you asked for, but I thought you might be interested in the 
alternate approach.

Regards,
Richie.

Mathematical Sciences Unit
HSL


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