Plotting of multiple comparisons in R ?

Question

Hi all,

When one wishes to compare (test) multiple groups (as is the case, for example, when doing anova), one is confronted with the issue of multiple comparisons. The same applys if we wish to plot the comparisons.

My question is thus, what tools (in R) do you know of that allow plotting that reflects multiple comparisons?

Currently, I know of only two (although I am sure there are more):

1. TukeyHSD( ) combined with plot( )
2. The way boxplot chooses the "notches"

Thanks, Tal

Answer 1

Package multcomp has e.g. plot.cld() -- you could try

library(multcomp)
example(plot.cld)

Also, a quick "multiple comparison plot" search at http://rseek.org reveals a few more packages and Task Views.