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33755
2007 Jun 15
2
model.frame: how does one use it?
Philipp Benner reported a Debian bug report against r-cran-rpart aka rpart.
In short, the issue has to do with how rpart evaluates a formula and
supporting arguments, in particular 'weights'.
A simple contrived example is
-----------------------------------------------------------------------------
library(rpart)
## using data from help(rpart), set up simple example
myformula <-