[R] help with contrasts.

From: Rodrigo Gazaffi <rgazaffi_at_carpa.ciagri.usp.br>
Date: Mon 26 Jun 2006 - 00:48:57 EST


Hello list,

I would like to know how can I use contrats in statistical analysis. I have a simple model, "one-way analysis of variance" "or two-way..."
(balanced case).

I've already used the command aov (model) to get the analysis of variance, but i know that my treatment could be organized in groups, so i would like to test these groups.

Example: I have 4 treatments t1, t2, t3, t4 and i would like to test
(1, 1, -1, -1) and (1, -1, 0, 0) and (0, 0, 1, -1).

thanks for the attention.

Rodrigo Gazaffi



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 Received on Mon Jun 26 00:57:42 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 26 Jun 2006 - 04:11:46 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.