Le jeudi 30 juillet 2009 à 16:41 -0600, Mark Na a écrit : > Dear R-helpers, > > I have a linear model with a year effect (year is coded as a factor), i.e. > the parameter estimates for each level of my year variable have significant > P values (see some output below) and I am interested in testing: > > a) the overall effect of year; > b) the significance of each year vis-a-vis every other year (the model > output only tests each year against the baseline year).
install.packges("multcomp") help.start() and use the vignettes ! They're good (and are a good complement to somewhat incomplete help pages : what in h*ll are valid arguments to mcp() beyond "Tukey" ??? Curently, you'll have to dig in the source to learn that...). HTH Emmanuel Charpentier ______________________________________________ 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.