Message-ID: <4A00AF5A.2020902@simecol.de>
Date: 2009-05-05T21:27:54Z
From: Thomas Petzoldt
Subject: self organizing map advice for categorical data
In-Reply-To: <692284019.1585951241541368913.JavaMail.root@zm07.stanford.edu>
George Chen schrieb:
> Hello,
>
> Could anybody offer any advice about implementing a Kohonen self organizing map for categorical data? Specifically I am wondering if there are any pre-existent packages that can deal with categorical data and/or how one would compare the input vector of categoricals with the self organizing map nodes.
>
> Thanks in advance.
>
> George Chen
>
Yes, there is a very nice one with excellent graphics, see article:
Ron Wehrens, Lutgarde M. C. Buydens (2007) Self- and Super-organizing
Maps in R: The kohonen Package. Journal of Statistical Software 21(5).
http://www.jstatsoft.org/v21/i05
Hope it helps
Thomas Petzoldt