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2011 Dec 30
1
Fwd: Re: Poisson GLM using non-integer response/predictors?
Hi,
Use offset variables if count occurrences of an event and you want to
model the
observation time.
glm(count ~ predictors + offset(log(observation_time)), family=poisson)
If you want to compare durations, look at library(survival), ?coxph
If tnoise_sqrt is the square root of tourist noise, your example seems
incorrect, because it is a predictor, not the dependent variable
tnoise_sqrt ~ lengthfeeding_log
Best wishes,
Matthias
Am 30.12.2011...