Re: [R] tree class in R?
DFARRAR == DFARRAR [EMAIL PROTECTED] on Sun, 5 Dec 2004 22:09:02 -0500 writes: DFARRAR I am trying to store a couple numbers for each DFARRAR partition, in a subset of the partitions of my data DFARRAR set. Of course, one can accomplish this using a DFARRAR binary tree. (The first split is on DFARRAR inclusion/exclusion of the first object, and so DFARRAR on.) I can probably simulate a tree using vectors. DFARRAR (One vector gives the index of left child node, DFARRAR another the index of the right child node.) DFARRAR However, it seems like there must be a useful class DFARRAR associated with the clustering or recursive DFARRAR partitioning procedures, perhaps not out there for DFARRAR everyone to see. I poked around on the R page and DFARRAR didn't see anything that clearly met my needs very DFARRAR directly. but maybe indirectly? There's the dendrogram class in R, -- ?dendrogram, which had been created with the aim to be a class that would allow both regression/classification trees and hierarchical cluster dendrograms to be represented. It's not just for binary trees, and definitely much nicer to use than a vector simulation version. DFARRAR I hope I would not have to learn DFARRAR recursive partitioning in R to find what I need. (well, it may be worth your time to learn something about rpart anyway; but you won't want to use it's representation of trees, I think) Martin Maechler, ETH Zurich __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] tree class in R?
Have you had a look at the rpart package? If you haven't installed it it may be worth doing so. Then you can type require(rpart) ?rpart.object Tom -Original Message- From: DFARRAR [mailto:[EMAIL PROTECTED] Sent: Monday, 6 December 2004 11:09 AM To: [EMAIL PROTECTED] Subject: [R] tree class in R? I am trying to store a couple numbers for each partition, in a subset of the partitions of my data set. Of course, one can accomplish this using a binary tree. (The first split is on inclusion/exclusion of the first object, and so on.) I can probably simulate a tree using vectors. (One vector gives the index of left child node, another the index of the right child node.) However, it seems like there must be a useful class associated with the clustering or recursive partitioning procedures, perhaps not out there for everyone to see. I poked around on the R page and didn't see anything that clearly met my needs very directly. I hope I would not have to learn recursive partitioning in R to find what I need. __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] tree class in R?
DFARRAR DFARRAR at vt.edu writes: : : I am trying to store a couple numbers for each partition, in a subset of the : partitions : of my data set. Of course, one can accomplish this using a binary tree. (The : first split is on : inclusion/exclusion of the first object, and so on.) I can probably simulate : a tree using : vectors. (One vector gives the index of left child node, another the index of : the right child node.) : However, it seems like there must be a useful class associated with the : clustering : or recursive partitioning procedures, perhaps not out there for everyone to : see. I poked around : on the R page and didn't see anything that clearly met my needs very directly. : I hope I would not : have to learn recursive partitioning in R to find what I need. Do a search of the r-help archives. There was binary tree code posted within the last year. __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
