I have a standard database - HouseVotes84
For example:
Class V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 V12 V13 V14 V15 V16
1 republican n y n y y y n n n y <NA> y y y n y
2 republican n y n y y y n n n n n y y y n <NA>
3 democrat <NA> y y <NA> y y n n n n y n y y n n
.
.
.
end I build a tree like this:
> hv.tree1=rpart(Class~.,HouseVotes84)
everything is ok! My question is:
What exactly mean "Class~.,"?
Why when I use "Class~.," - then I get the best solution but when I use as a
parameter like this:
> hv.tree2=rpart(V2~.,HouseVotes84)
I also get solution but not such good like before.
--
View this message in context:
http://www.nabble.com/Question-about-rpart%28sth%7E.%2Cdatabase%29-tp23117162p23117162.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
