On 04/03/2012 11:31 PM, Kristen Gorman wrote:
Dear all,
I have R code to run AIC including multi-model inference. I am running into a
problem in calling the output from models where both parameters in an
interaction are not included as main effects.
Why would you want to do that? Why would you
Dear R Ecology Group Members,
I have data on parasite prevalences (coded as 0s or 1s) for several species
of parasites of one host species, and I am interested in seeing if these
parasites can predict health parameters that I measured in the hosts. I
wanted to tackle this with a multiple
Hi Vincenzo,
There are a couple of things that might be worth considering.
In your first model you consider only main effects and no interactions.
Do any of your main effects drop off after you run stepAIC? If so, when
you go to build an interaction model don't include these main effects
only
--
Erin L. Page
MS Environmental Science, Water and Wetland Resources
SUNY College of Environmental Science and Forestry
http://www.esf.edu/efb/horton/Page_bio.htm
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