Re: R-beta: R: CART

Thomas Lumley (
Thu, 17 Apr 1997 08:52:47 -0700 (PDT)

Date: Thu, 17 Apr 1997 08:52:47 -0700 (PDT)
From: Thomas Lumley <>
To: Stefano Merler <>
Subject: Re: R-beta: R: CART
In-Reply-To: <199704171120.NAA04874@gea>

On Thu, 17 Apr 1997, Stefano Merler wrote:

> Has anybody ported the Classification and Regression Trees package to R?  

There is no freely available S code for CART.  
The best bet is either to use Therneau's C routines (available as rpart 
in the statlib general section) or one of the survival tree regression 
packages for S (or both) and extend them. It's not going to be trivial. 
On the other hand you would probably end up with a better implementation 
that S-PLUS has.

Thomas Lumley
Biostatistics		: "Never attribute to malice what  :
Uni of Washington	:  can be adequately explained by  :
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