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1. Tree for ordinal variable with uneven priors (score: 1): Author: "Peter Flom" <flom@ndri.org>; Date: Fri, 28 Jun 2002 13:35:07 -0400; I am interested in fitting a tree model for a variable which is ordinal, and where the distribution is far from uniform. More specifically, I would like to investigate drug use, which we have operat; /archives/html/s-news/2002-06/msg00243.html (7,389 bytes)
2. Re: Tree for ordinal variable with uneven priors (score: 1): Author: ripley@stats.ox.ac.uk; Date: Fri, 28 Jun 2002 19:19:36 +0100 (BST); That predates S-PLUS! Use rpart and set up a loss matrix in the `parm' argument. You can find rpart at the Mayo site, and pre-compiled for Windows at mine (S+2000 and S+6 in separate areas). -- Brian; /archives/html/s-news/2002-06/msg00244.html (8,541 bytes)

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