Tukey HSD plot with lines indicating (non-)significance

m?. den 14. 01. 2013 klokka 13.58 (-0500) skreiv Richard M. Heiberger:

Please look at the MMC (Mean-mean Multiple Comparisons) plot in the HH
package. It displays both the means and the differences. 

install.packages("HH") ## if you don't already have it.
library(HH)
?MMC 

Thanks for the suggestion. That?s a very interesting and clever way of
displaying both means and differences. It?s not what I was looking for,
though, as it doesn?t display the actual data.

For the record, here?s the syntax for using MMC on the dataset mentioned
in my original posting:

    l.mmc=mmc(l, linfct = mcp(trt = "Tukey"))
    plot(l.mmc)

(It looks best on data where the group means aren?t very close;
otherwise the labels might overlap.)

Karl Ove Hufthammer