Hey Folks, I am new to R and am trying to modify my multivariate eco-statistics course by giving my students the option of doing all of the assignments in R.
One of the exercises I've been doing in Primer, but would like to do in R, is a repeated measures permutation MANOVA, wherein I examine how plant species composition responds to a restoration treatment over time. The experimental design is pretty simple: a CRD with 10 treated plots and 10 control plots (each plot is considered equivalent to a random "subject") with composition measured in two different years, similar to a simple BACI study, except that I have two "after" censuses (1 year after the treatment was initiated and 3 years after the treatment was initiated) and no "before" census of the vegetation. I thought I might be able to do this using adonis and the "strata" argument, but it is not clear to me how to nest "plot" within treatment but not within year so that the treatment effect is tested with "between-subjects" error while year and its interaction with treatment are tested with "within-subjects" error. I'm happy to provide more details if necessary. Thanks, Steve J. Stephen Brewer Professor Department of Biology PO Box 1848 University of Mississippi University, Mississippi 38677-1848 Brewer web page - http://home.olemiss.edu/~jbrewer/ FAX - 662-915-5144 Phone - 662-915-1077 [[alternative HTML version deleted]] _______________________________________________ R-sig-ecology mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
