On 2/19/2009 11:51 AM, Saeed Ahmadi wrote: > Hi, > > I have a basic and simple question on how to code pairwise (multiple) mean > compariosn between levels of a factor using one of the Duncan, Tukey or LSD.
Here is one approach: library(multcomp) summary(glht(lm(Petal.Width ~ Species, data = iris), linfct = mcp(Species = "Tukey"))) > Thanks in advance, > Saeed -- Chuck Cleland, Ph.D. NDRI, Inc. (www.ndri.org) 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.