Re: [R] Classification tree data structure

From: Hades <hades_at_aurix.plus.com>
Date: Wed 19 Oct 2005 - 02:25:20 EST

   

 That's most helpful. Thank you very much for your time.    Best regards,
   Maria
   On Tue Oct 18 17:18 , Prof Brian Ripley <ripley@stats.ox.ac.uk> se nt:    

     On Tue, 18 Oct 2005,      > Hi there,

>
> I am growing classification trees using the 'tree' p add-on to R.
>
> I would like to convert the 'R' output to the SAS fo by Salford Systems' commercial CART software in order to interfac e with some
> other software.
>
> My question is:
> How can I parse the R tree data structure in order t tree
> structure? The 'tree' class has a member '$frame' wh the
> splits at each node, but as far as I can see does no the
> daughter nodes. Is this information accessible throu interface to
> class 'tree' or do I need to dive into the C code?
The daughter nodes of n are 2n and 2n+1. The print method, print.tree, is < parse the tree (and you can see the pattern of the numbers from its result). -- Brian D. Ripley, [1]ripley@stats.ox.ac.uk Professor of Applied Statistics, [2]http ://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595

References

  1. 3D"javascript:top.opencompose('ripley_at_stats.ox.ac. 2. file://localhost/tmp/3D"parse.pl?redirect=http%3A%2F%
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Received on Wed Oct 19 02:40:03 2005

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