Message-ID: <82c88418-ceaa-4174-a74e-0e09f4a786a7@email.android.com>
Date: 2012-10-30T02:09:15Z
From: Jeff Newmiller
Subject: Interaction
In-Reply-To: <6324cf12741207300173e2df272b1f73.squirrel@webmail.uel.br>
I thought addition was commutative. I am puzzled by your question.
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Sent from my phone. Please excuse my brevity.
Silvano Cesar da Costa <silvano at uel.br> wrote:
>Hi,
>
>I'm fitting a model with 3 variables: A, B and SNP.
>The response variable is Y.
>
>I would like fit the following model, in this order:
>
>Y ~ A + B + A*B + SNP
>
>In general, the R sets of the form:
>
>Y ~ A + B + SNP + A*B
>
>How do this?
>
>
>---------------------------------------------
>Silvano Cesar da Costa
>
>Universidade Estadual de Londrina
>Centro de Ci?ncias Exatas
>Departamento de Estat?stica
>
>Fone: (43) 3371-4346
>
>______________________________________________
>R-help at 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.