I regressed a count variable on 5 ratio-scale
predictors using glm(...,family=poisson)in S Plus 2000
(Windows 2000). The fit was good (1-res/null deviance
= 0.75, all variables significant, errors distributed
neatly across observed values, etc.). I then
extrapolated predictions across the very large dataset
from which the training dataset was sampled by
applying the summary() coefficients to their
respective variables.
The predicted values, however, are not on the same
scale as the response, and I have been unable to
transform the predictions to the appropriate scale.
WHAT EQUATION DOES S PLUS 2000 USE TO TRANSFORM THE
LINEAR PREDICTIONS OF GLM(...,FAMILY=POISSON) TO THE
RESPONSE SCALE?
Thank you,
Joe Sexton
=====
Landscape Ecology: Modeling and Analysis Center
& Department of Forest, Range, and Wildlife Science
Utah State University
"Go deeper."
-Zarathustra
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