[R] lme or gls prediction intervals

[joris.dewolf at cropdesign.com]

Martin,


Have you checked ?intervals.gls


This intervals are approximate, but this would be the obvious starting
point to me.


Joris










                                                                           
             "Martin Henry H.                                              
             Stevens"                                                      
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                                       [R] lme or gls prediction intervals 
                                                                           
             24/07/2007 19:22                                              
                                                                           
                                                                           
                                                                           
                                                                           




Hi folks,
I am trying to generate 95% confidence intervals for a gls model
using predict.nlme
with
R version 2.5.1 (2007-06-27)
. nlme: Linear  and Nonlinear Mixed Effects Models. R package version
   3.1-83.

I have looked in help, and I can do it for lm and glm models, and I
can generate simple predictions for lme models with various levels --
I am familiar with the basics.

Is there a way to get prediction intervals for gls models? My "best"
model uses varPower(), so I am reluctant to fall back on lm predictions.

Thank you,

Hank


Dr. Hank Stevens, Associate Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056

Office: (513) 529-4206
Lab: (513) 529-4262
FAX: (513) 529-4243
http://www.cas.muohio.edu/~stevenmh/
http://www.muohio.edu/ecology/
http://www.muohio.edu/botany/

"E Pluribus Unum"

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