[R] Doing pairwise comparisons using either Duncan, Tukey or LSD

Chuck Cleland ccleland at optonline.net
Thu Feb 19 19:20:28 CET 2009

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:


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)
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