different result is obtained for the same input using self-organizing map

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liangjian 2012-2-28

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评论： Mahmoud ELKAFAFY 2019-10-14

I used Neural Network Toolbox to train a self-organizing map for a given data set. I found that each run gave me a quite different result, like different "sample hits map". How to understand this difference? I just followed the standard routine, like

net = selforgmap([8 8]);
net = train(net, testInput);

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Answer 1

Greg Heath 2012-3-3

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Initialize the random number generator to the same intial state; otherwise the results will be different.

Hope this helps.

Greg

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Mahmoud ELKAFAFY 2019-10-14

But, if you change the initialization of random number generator (e.g., rng(7) instaed of rng(3) for insatance), you will still get different results.

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