R help - Feb 2006 - AID / Tree Analysis in R

Dear Colleagues,

 

I've been looking for a function that can perform a tree analysis, similar
to CHAID or QUEST. The key point is that in this case the variables are not
binary but nominal (10 different values), so "tree" (from the tree
package) won't work. Does anybody know help?

 

Sincerely, 

 

___________________

Markus Preisetanz

Consultant

 

Client Vela GmbH

Albert-Roßhaupter-Str. 32

81369 München

fon:          +49 (0) 89 742 17-113

fax:          +49 (0) 89 742 17-150

mailto:markus.preisetanz@clientvela.com
<mailto:markus.preisetanz@clientvela.com>



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On Tue, 14 Feb 2006, Markus Preisetanz wrote:
> I've been looking for a function that can perform a tree analysis, 
> similar to CHAID or QUEST. The key point is that in this case the 
> variables are not binary but nominal (10 different values), so
"tree"
> (from the tree package) won't work. Does anybody know help?
What makes you say that?  It comes with examples of categorical variables.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  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

On Tue, 14 Feb 2006, Markus Preisetanz wrote:
> Dear Colleagues,
>
>
>
> I've been looking for a function that can perform a tree analysis,
similar to CHAID or QUEST.
`ctree' in package `party' implements unbiased recursive partitioning in
a
way inspired by CHAID. The methodological details are in

@article{party2006,
     key = {566},
     author = {Torsten Hothorn and Kurt Hornik and Achim Zeileis},
     title = {Unbiased Recursive Partitioning: A Conditional Inference
              Framework},
     journal = {Journal of Computational and Graphical Statistics},
     year = 2006,
     note = {in press}
}

A preprint is available from
http://statmath.wu-wien.ac.at/~zeileis/papers/Hothorn+Hornik+Zeileis-2006.pdf

The package vignette explains the operational details.

HTH,

Torsten
> The key point is that in this case the variables are not binary but 
> nominal (10 different values), so "tree" (from the tree package)
won't
> work. Does anybody know help?
>
>
>
> Sincerely,
>
>
>
> ___________________
>
> Markus Preisetanz
>
> Consultant
>
>
>
> Client Vela GmbH
>
> Albert-Ro?haupter-Str. 32
>
> 81369 M?nchen
>
> fon:          +49 (0) 89 742 17-113
>
> fax:          +49 (0) 89 742 17-150
>
> mailto:markus.preisetanz at clientvela.com <mailto:markus.preisetanz at
clientvela.com>
>
>
>
> Diese E-Mail enth?lt vertrauliche und/oder rechtlich gesch?tzte
Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail
irrt?mlich erhalten haben, informieren Sie bitte sofort den Absender und
vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte
Weitergabe dieser E-Mail ist nicht gestattet.
>
> This e-mail may contain confidential and/or privileged infor...{{dropped}}
>
>