[R] Question about rpart and regression trees

From: Paul Smith <phhs80_at_gmail.com>
Date: Mon 22 Jan 2007 - 22:26:00 GMT

Dear All

I would like to use rpart to obtain a regression tree for a dataset like the following:

Y	X1	X2	X3	X4
5.500033	B	A	3	2
0.35625148	D	B	6	5
0.8062546	E	C	4	3
5.100014	C	A	3	2
5.7000422	A	A	3	2
0.76875436	C	A	6	5
1.0312537	D	A	4	1

Y is the objective variable. X1, X2, X3 and X4 can take, respectively, the following values:

X1: A,B,C,D,E
X2: A,B,C,D,E
X3: 3,4,5,6

X4. 1,2,3,4,5

Should I convert X3 and X4 to factor before running rpart?

Thanks in advance,


R-help@stat.math.ethz.ch 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. Received on Tue Jan 23 09:31:33 2007

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Tue 23 Jan 2007 - 07:30:32 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.