Nov 23, 2011 at 1:27am Andreas wrote: > I would like to do multiple comparisons for treatment levels within day > (i.e. across treatments > for each day in turn)
Andreas, The following does what you want. To see how/why it works, look at the vignette to package multcomp, where there is an example. Note that I had to change "mean.on.active" to "mean_on_active". ## library(nlme); library(multcomp) Tdf <- "Your attached data set" m.final<-lme(mean.on.active ~ treat * day,random=~1|id,na.action=na.omit, data=Tdf) Tdf$IntFac <- interaction(Tdf$treat, Tdf$day, drop=T) m.finalI<-lme(mean.on.active ~ IntFac,random=~1|id,na.action=na.omit, data=Tdf) summary(m.final) summary(m.finalI) glht(m.finalI, linfct=mcp(IntFac = "Tukey")) Regards, Mark. ----- Mark Difford (Ph.D.) Research Associate Botany Department Nelson Mandela Metropolitan University Port Elizabeth, South Africa -- View this message in context: http://r.789695.n4.nabble.com/glht-for-lme-object-with-significant-interaction-term-tp4097865p4099459.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
