[R] SOM (Self-organizing map)

[Uli Flenker; Raum 704]

Do I remember correctly that SOMs are "self oraganizing maps" and are more
or less identical to Kohonen networks? As far as I know there is no R
package for that purpose. 

A widely used - at least in Germany - neural network simulator is SNNS
(Stuttgarter Neuraonale Netze Simulator). Its available freely under a
GNU like license from a lot of german university servers. The people who
built it can be reached via <http://www.informatik.uni-stuttgart.de>.
You will find executables for several platforms as well as source code and
documentation.

SNNS also is included in a number of Linux distributions. It is in SuSE
and it at least has been in DLD.

I used it some years ago and did not go beyond standard backpropagation
(which can be done in R using the nnet library included in VR). So I can't
tell you about the Kohonen capabilities. But its included in the simulator
definetely.

        Uli Flenker
        Institute of Biochemistry
        German Sports University Cologne
        Carl-Diem-Weg 6

        50933 Cologne / Germany

        Phone 0049/0221/4982-493


On Mon, 30 Oct 2000, Jun Yan wrote:

> Does anyone know of any SOM library for R? or any stand alone freeware?
> A search from google returns SOM_PAK 3.1 developed at Helsinki University
> of Technology. Is there newer version?
> 
> 
> Jun
> 
> 
> 
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