Boxplot question

["Paul, David A" <paulda@BATTELLE.ORG>]

My data have three columns: data$relative.humidity, data$precipitation,
and data$temperature.

I have been using "boxplot(split(data$relative.humidity, group),
                         split(data$precipitation, group),
                                     split(data$temperature, group))"

The output from this command is less than ideal.
I would like to produce a graph with two sets of boxplots such that the
graph is divided into two halves, the left half corresponding to group = 1
and the right half corresponding to group = 2, where each "half" of the graph
contains three boxplots corresponding to the three variables. 
Labels below each "half" would be ideal.

This is undoubtedly a simple question, and I would be most grateful for
pointers in the right direction.

Much thanks in advance,

 David Paul, Ph.D.
  Battelle Memorial Institute
  505 King Avenue
  Columbus, OH  43201
  614.424.3176