[R] cross-validation for count data

[valerio.orioli at libero.it]

Hi everybody,
I'm trying to use cross-validation (cv.glm) for count data. Does someone know which is the appropriate cost function for Poisson distribution?
Thank you in advance.

Valerio. 
Conservation Biology Unit
Department of Environmental and Territory Sciences
University of Milano-Bicocca
Piazza della Scienza,1
20126 Milano, Italy.



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