[R] R not responding for nested glm model

[Yuval Sapir]

Hi,
I'm trying to perform a glm model on count data (poisson distribution of 
the errors) where data are nested.
glmmodel-glm(y~x/z,poisson)
x and z are factors, z nested within x, y is count data.
In that point the R just stuck and not respond anymore. I tried
glmmodel-glm(y~x,poisson)
and there were no problems. Trying
glmmodel-glm(y~x/z)
gave the same no response. Similar problem with continuous data (normal 
distribution of the errors).
I am using R 2.3.1 on Windows XP
Thanks
Yuval

-- 
Yuval Sapir, PhD
Post-doctorate research associate
Dept of Genetics
University of Georgia
Athens, GA 30602, USA

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Re: [R] R not responding for nested glm model

[Sundar Dorai-Raj]

Yuval Sapir said the following on 10/12/2006 1:08 PM:
 Hi,
 I'm trying to perform a glm model on count data (poisson distribution of 
 the errors) where data are nested.
 glmmodel-glm(y~x/z,poisson)
 x and z are factors, z nested within x, y is count data.
 In that point the R just stuck and not respond anymore. I tried
 glmmodel-glm(y~x,poisson)
 and there were no problems. Trying
 glmmodel-glm(y~x/z)
 gave the same no response. Similar problem with continuous data (normal 
 distribution of the errors).
 I am using R 2.3.1 on Windows XP
 Thanks
 Yuval
 

Please see the signature and provide commented, minimal, 
self-contained, reproducible code. Namely, what is 'x' and 'z'? My 
guess is ~x/z produces so large a model matrix you are approaching your 
limits of memory. But, there's no way to tell without more information.

HTH,

--sundar

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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.