[R] Pairwise comparison after repeated measures ANOVA

From: Felipe Martínez-Pastor <Felipe.Martinez_at_uclm.es>
Date: Wed 15 Feb 2006 - 23:39:03 EST

I am analyzing some data obtained after measuring some parameters at different times in samples obtained from many subjects. The model is quite simple: aov(parameter ~ Time + Error(Subject/Time))

Now I want to make a pairwise comparison between the levels of Time. However, I have not find how to do such a thing. I cannot use TukeyHSD or pairwise.t.test, I supposse. Maybe using contrasts?

Could you aim me at some kind of information? All I have found is information on ANOVA, but not how to compare the levels of the factors afterwards.

Maybe I simply do not understand how this really works, my background is not very deep in statistics.
Thank you.


Felipe Martínez Pastor, Ph. D.
Ciencia y Tecnología Agroforestal
Av. España s/n
02071-Albacete (Spain)
Phone: +34 967 599 200+2581
Fax: +34 967 599 238+2081
Mobile: +34 687 365 362
e-mail: Felipe.Martinez@uclm.es
Jabber: felipe.martinez@jabberes.org

website: http://www.germplasm.all.at
Ningún investigador sin contrato.
Employment rights for Spanish junior researchers.

R-help@stat.math.ethz.ch mailing list
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Received on Wed Feb 15 23:43:45 2006

This archive was generated by hypermail 2.1.8 : Fri 03 Mar 2006 - 03:42:31 EST