MATLAB: What is validation failure Artificial neural network

annappsmachine learningmuneural networkvalidation check

while using nntraintool the training stops when no of validation failures reach certain prescribed number. What exactly is this Validation failure? Also, what is the term like Mu stands for?

Best Answer

To prevent the net from performing poorly on nontraining (validation, test and unseen data) while learning well on training data, training stops if the validation performance degrades for 6 (default) consecutive epochs. The procedure is called
 VALIDATION STOPPING.
Hope this helps.
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Greg
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