John, There is a good example of one way of doing this in "multcomp-examples.pdf" of package multcomp. See pages 8 to 10.
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/Contrasts-with-an-interaction-How-does-one-specify-the-dummy-variables-for-the-interaction-tp3948792p3950225.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.
