Dear list
For my work, it would be helpful if rpart worked seamlessly with an
empty model:
library(rpart); rpart(formula=y~0, data=data.frame(y=factor(1:10)))
Currently, an unrelated error (originating from na.rpart) is thrown.
At some point in the near future, I'd like to release a package to CRAN
which uses rpart and relies on that functionality. I have prepared a
patch (minor modifications at three places, and a test) which I'd like
to propose for inclusion in the next CRAN release of rpart. The patch
can be reviewed at https://github.com/krlmlr/rpart/tree/empty-model, the
files (based on the current CRAN release 4.1-8) can be downloaded from
https://github.com/krlmlr/rpart/archive/empty-model.zip.
Thanks for your attention.
With kindest regards
Kirill Müller
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