F1 score is 0 for the second class, and worse for the first-one. In generally it gets worse.
I really can’t understand. I trained other models(SVC, Trees, Random forest), and f1-score improve significantly after upsampling
I have problems only with neural network. Could be possible that neural network is a model too complicated to solve this problem?
Dataset is umbalaced and training set is really poor.
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just to be clear, this is the result of neural network.