How to combat the problem of overfitting in a Matlab Neural Network

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Oscar Schyns 2017-6-15

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https://ww2.mathworks.cn/matlabcentral/answers/344905-how-to-combat-the-problem-of-overfitting-in-a-matlab-neural-network

I constructed my own neural network with matlab but it is a bit overfitted. Online I red that with the function net = feedforwardnet(20,'trainbr'); but with it the overfitting is not much better. The data is already distributed randomly over the samples. I also tried to combine the forecasting results of more networks.

My goal is to change the minimization goal so that it includes a term of the squared parameters calculated by the NN