Links

Papers about SOM Toolbox

• Neural Network Tool for Data Mining: SOM Toolbox: a paper on the computational load and applicability of SOM Toolbox 2.0 in TOOLMET 2000: original paper as PostScript, corrected paper as PostScript, and both zipped.
• Self-Organizing Map in Matlab: the SOM Toolbox: paper on SOM Toolbox 2.0 in Matlab-DSP 1999 conference. Note that the paper is slightly incorrect as there have been a few changes in the Toolbox since. Here are updated versions of the paper in MS-Word 2000 format, as PostScript, and PDF.
• Self-Organizing Map for Data Mining in MATLAB: the SOM Toolbox: a 1-page presentation on SOM Toolbox 1.0 in SNE journal.

A short introduction to SOM

Self-Organizing Map algorithm, an introduction by Teuvo Kohonen

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Theses

• by members of the SOM Toolbox team at CIS
  • Using SOM in data mining by Juha Vesanto (2002)
  • Unsupervised Pattern Recognition Methods for Exploratory Analysis of Industrial Process Data by Esa Alhoniemi (2002)
  • From Insights to Innovations: Data Mining, Visualization, and User Interfaces by Johan Himberg (2004)
• on exploratory data analysis using SOM at CIS
  • Data exploration using self-organizing maps by Samuel Kaski (1997)
  • Using Visualization, Variable Selection and Feature Extraction to Learn from Industrial Data by Sampsa Laine (2003)

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Demos at CIS that use SOM

Some interesting demonstrations of applications that use SOM

• WEBSOM (document retrieval)
• PicSOM (image retrieval)
• SOM demos in Java

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Interesting MATLAB software

• Matlab (Neural Networks Toolbox)
• Free mathematical libraries
• Growing Cell Structure Visualisation Toolbox
• Netlab a neural network software
• A MATLAB clustering package
• Correlation Matrix Pseudocolor Map Function
• Probability Density Model in the Self-Organizing Map
• GHSOM Toolbox implementing the growing hierarchical SOM algorithm (another mirror here)

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Other software implementations of the SOM

Below is listed a number of commercially or freely available software packages that include implementation of the SOM algorithm.

• SOM_PAK
  • MS-DOS / UNIX
  • Free, from the website.
  • The "official" C-language SOM implementation.
• Neural Data Analysis (NDA)
• SOMine
• Nenet
• Trajan
• NeuroShell2
• NeuroSolutions
• Visipoint

(The list is an updated version of the old link list which contained also some evaluations. They are a bit out of the date (made 1999-2000). You can reach the old page [here]