while using som how to cluster the data into three clusters?

Question

praislin 2012-10-8

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I'm using som for clustering in my project. I want the image to be clustered into three clusters. so in this case how to set the values for 'd1' and 'd2' in the function 'selforgmap' ?

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Answer 1

Greg Heath 2012-10-9

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Kohonen's SOM algorithm is for UNSUPERVISED clustering. For supervised clustering he recommends his LVQ and LVQ2 algorithms

Nevertheless, you could try

1. Set d1 or d2 to be 3 and vary the other

or

2. Try initsompc

>> lookfor som

>> lookfor LVQ

Hope this helps.

Greg

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Answer 2

Junaid 2012-10-8

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Try using VLFEAT matlab implementation for Clustering, it has many algorithms with tutorial and example codes. You can easily see visually the clusters with different K.