I was recently asked to perform a GLM analysis (the person comes from the JMP world) on a repeated measures design. I have found some things using aov but I cannot find anything with glm. In fact, multiple regressions in general with repeated measures seems to be poorly covered in documentation. I remember SPSS has separate commands to handle them. I have within variables SOA and ec and a between factor subjrt. The independent variable was RT. The ec factor cannot be construed as parameteric whereas SOA can.
On Wed, 19 Nov 2003, John Christie wrote:> > I was recently asked to perform a GLM analysis (the person comes from > the JMP world) on a repeated measures design. I have found some things > using aov but I cannot find anything with glm. In fact, multiple > regressions in general with repeated measures seems to be poorly > covered in documentation. I remember SPSS has separate commands to > handle them. > I have within variables SOA and ec and a between factor subjrt. The > independent variable was RT. The ec factor cannot be construed as > parameteric whereas SOA can. >If the person comes from the JMP world, GLM doesn't translate as glm(). You probably want either aov() or lme() [in the nlme package], depending on how complicated the analysis is. -thomas Thomas Lumley Assoc. Professor, Biostatistics tlumley at u.washington.edu University of Washington, Seattle
Have you checked the following:
www.r-project.org -> search -> "R site search"?
In particular, have you considered "lme" in package
"nlme"?
Probably the best documentation on this is Pinhiero and Bates (2000)
Mixed-Effects Models in S and S-Plus (Springer).
hope this helps. spencer graves
John Christie wrote:
>
> I was recently asked to perform a GLM analysis (the person comes
> from the JMP world) on a repeated measures design. I have found some
> things using aov but I cannot find anything with glm. In fact,
> multiple regressions in general with repeated measures seems to be
> poorly covered in documentation. I remember SPSS has separate
> commands to handle them.
> I have within variables SOA and ec and a between factor subjrt.
> The independent variable was RT. The ec factor cannot be construed as
> parameteric whereas SOA can.
>
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