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genderal
2008 Jan 05
2
Behavior of ordered factors in glm
I have a variable which is roughly age categories in decades. In the
original data, it came in coded:
> str(xxx)
'data.frame': 58271 obs. of 29 variables:
$ issuecat : Factor w/ 5 levels "0 - 39","40 - 49",..: 1 1 1 1...
snip
I then defined issuecat as ordered:
> xxx$issuecat<-as.ordered(xxx$issuecat)
When I include issuecat in a glm model, the result