dear all, I want to perform a posthoc test for my ANCOVA: a1<-aov(seeds~treatment*length)
With summary(glht(a1, linfct = mcp(treatment = "Tukey"))) R tells me: "covariate interactions found -- please choose appropriate contrast" How do I build these contrasts? Ideally, I would like to have the posthoc test for the ANCOVA including a block-effect a2<-aov(seeds~treatment*length+Error(site)) How do I make a posthoc test here? Thanks for any comments Walter -- ***** Dr. Walter Durka Department Biozönoseforschung Department of community ecology Helmholtz-Zentrum für Umweltforschung GmbH - UFZ Helmholtz Centre for Environmental Research - UFZ Theodor-Lieser-Str. 4 / 06120 Halle / Germany [EMAIL PROTECTED] / http://www.ufz.de/index.php?en=798 phone +49 345 558 5314 / Fax +49 345 558 5329 +++++++++++++++++++++++++++++++++++++++++++++++++ Das UFZ hat einen neuen Namen: Helmholtz-Zentrum für Umweltforschung GmbH - UFZ The UFZ has a new name: Helmholtz Centre for Environmental Research - UFZ +++++++++++++++++++++++++++++++++++++++++++++++++ ______________________________________________ R-help@stat.math.ethz.ch 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.
