[R] glm and percentage data with many zero values
BXC (Bendix Carstensen)
bxc at steno.dk
Fri Jan 21 14:46:13 CET 2005
The ZIP model can be fitted with Jim Lindsey's function fmr
from his gnlm library, see:
http://popgen0146uns50.unimaas.nl/~jlindsey/rcode.html
Bendix Carstensen
----------------------
Bendix Carstensen
Senior Statistician
Steno Diabetes Center
Niels Steensens Vej 2
DK-2820 Gentofte
Denmark
tel: +45 44 43 87 38
mob: +45 30 75 87 38
fax: +45 44 43 07 06
bxc at steno.dk
www.biostat.ku.dk/~bxc
----------------------
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Gregor GORJANC
> Sent: Friday, January 21, 2005 1:05 PM
> To: christian.kamenik at ips.unibe.ch; r-help at stat.math.ethz.ch
> Subject: RE: [R] glm and percentage data with many zero values
>
>
> A hint.
>
> You might try with ZIP i.e. zero inflated poisson model. I
> did not used it,
> but I have such data to work on. So if there is anyone hwo
> can point how to
> do this in R - please. There is also a classs of ZINB or
> something like
> that for zero inflated negative binomial models.
>
> Actually I just went on web and found a book from Simonoff "Analyzing
> Categorical Data" and there are some examples in it for ZIP
> et al. Look
> examples for sections 4.5 and 5.4
>
http://www.stern.nyu.edu/~jsimonof/AnalCatData/Splus/analcatdata.s
http://www.stern.nyu.edu/~jsimonof/AnalCatData/Splus/functions.s
--
Lep pozdrav / With regards,
Gregor GORJANC
---------------------------------------------------------------
University of Ljubljana
Biotechnical Faculty URI: http://www.bfro.uni-lj.si
Zootechnical Department mail: gregor.gorjanc <at> bfro.uni-lj.si
Groblje 3 tel: +386 (0)1 72 17 861
SI-1230 Domzale fax: +386 (0)1 72 17 888
Slovenia
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