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Is the correlation distance function for training self-organizing map (SOM) available in Matlab?

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Nancy
Nancy 2011-11-1
编辑： Image Analyst 2013-10-20
Hi.
I have a data set of expression levels of different genes, and I want to build a SOM to cluster different gene expression levels. Now I really need to use correlation distance metric to train the map.
I noticed that in Matlab there are four distance functions are available : dist, linkdist, mandist, boxdis. Normally, dist (refers to Euclidean distance) is widely used. And also, I can find the correlation distance can be obtained by using D = pdist(X,'correlation') .
Is it possible that train a SOM using correlation distance function in Matlab?
Thanks.

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回答（1 个）

Amith Kamath
Amith Kamath 2011-11-2
I don't know if MATLAB has in-built functions to handle those aspects of SOM, but this may help:
http://www.cis.hut.fi/somtoolbox/package/docs2/somtoolbox.html
Thanks!

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