How can I continue training with additional data to an already existed neural network?

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Lamesginew 2014-10-9

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https://ww2.mathworks.cn/matlabcentral/answers/158001-how-can-i-continue-training-with-additional-data-to-an-already-existed-neural-network

编辑： Roberto de Freitas Cabral 2018-8-30

I have a trained neural network with some data set, let A. That is, the network is trained on data set A. Later on, I want to train this network which is trained on data set A with some additional data set, let B. I think, making together data set A and B, and then training the network is possible. But, what I want is not training for the merged data set, rather continue training on the existed trained network for data set B only. Any help for this... contact me via lame2002@gmail.com. Thanks,

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Answer 1

Greg Heath 2014-10-10

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In general, this technique will not work if you want to preserve good performance on A.

If you don't want to use all of A, use a subset that exemplifies the basic characteristics of A.

There is a huge history of NN forgetting. Don't waste your time with your original idea.

Spend your time thinking about how to find that characterization subset. Unsupervised clustering of A is one idea. Then use the A cluster centers with B.

Hope this helps.

Thank you for formally accepting my answer

Greg