[R] glm and percentage data with many zero values

[Gregor GORJANC]

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

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