[R] manova and table of means by factor levels

From: Matthew Harbur <mharbur_at_umn.edu>
Date: Mon 31 Jul 2006 - 11:58:54 EST


I am resubmitting my question from earlier today -- this time with the proper plain text formatting.

I have a dataset in which I have identified a three-way interaction. Factor A has 3 levels, factor B has 4 levels, and factor C has 3 levels.  I would like to produce the following:

  1. A manova in which I can test the effect of factor C for each combination of factor A * factor B.  I know how to do this using a series of “do” commands, but I wonder whether there is a more significant solution. For other converts from SAS, I am specifically looking for the R equivalent of the “by” command in PROC GLM.
  2. Create a table of means that, for each level of factor B, shows the interaction of factors A and C. Thus, I need to manipulate summary.formula or another table-generating program to produce subtotals. If that is not possible, is there another way to avoid generating and binding multiple subsets into one table?

I have searched the R-help archives and the internet, but to no avail.  The closest posting that I have found is:
http://tolstoy.newcastle.edu.au/R/help/05/04/3239.html. Would someone please help me?

Thank you.

Matthew M. Harbur
University of Minnesota Southwest Research and Outreach Center 23669 130th Street
Lamberton, MN  56152
(507) 752-5091 (office)
(507) 752-5097 (fax)



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. Received on Mon Jul 31 12:05:25 2006

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Mon 31 Jul 2006 - 14:18:15 EST.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.