How to cluster training data before training a neural network

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Suresh 2013-9-24

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回答： Image Analyst 2013-11-7

Hi all, I am training a neural network with Input (4x120 matrix) and Output (3x120 matrix) for patter recognition.Before training network i would like to cluster the data.What procedure can be followed ? After clustering how to train a network with clustered output ? Thank you in advance

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Answer 1

Shashank Prasanna 2013-9-24

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Could you explain further? There are a number of ways to cluster your data:

Statistics Toolbox:

http://www.mathworks.com/help/stats/unsupervised-learning.html

Neural Network Toolbox:

http://www.mathworks.com/help/nnet/ug/cluster-with-self-organizing-map-neural-network.html

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Greg Heath 2013-9-25

In general, don't put too much faith in unsupervised clustering to directly train a classifier.

However, unsupervised clustering can be a useful tool for initializing a supervised clustering classifier. A competing method of initialization is to use individual unsupervised clustering for each class.

Most of all, the visualization of clustering results are very helpful for understanding classifier performance.

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