poi.obs.pred {COUNT}

R Documentation

Table of Poisson counts: observed vs predicted proportions and difference

Description

poi.obs.pred is used to produce a table of a Poisson model count response with mean observed vs mean predicted proportions, and their difference.

Usage

poi.obs.pred(len, model)

Arguments

len	highest count for the table
model	name of the Poisson model created

Details

poi.obs.pred is used to determine where disparities exist in the mean observed and predicted proportions in the range of model counts. poi.obs.pred is used in Table 6.15 and other places in Hilbe (2011). poi.obs.pred follows glm(), where both y=TRUE and model=TRUE options must be used.

Value

Count	count value
obsPropFreq	Observed proportion of counts
avgp	Predicted proportion of counts
Diff	Difference in observed vs predicted

Author(s)

Joseph M. Hilbe, Arizona State University, and Jet Propulsion Laboratory, California Institute of Technology Andrew Robinson, University of Melbourne, Australia

References

Hilbe, J.M. (2011), Negative Binomial Regression, second edition, Cambridge University Press.

See Also

myTable

Examples

data(medpar)
mdpar <- glm(los ~ hmo+white+type2+type3, family=poisson, data=medpar, y=TRUE, model=TRUE)
poi.obs.pred(len=25, model=mdpar)

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