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how can I solve imbalanced problem?
I used adaboostm1 weka, but it doesn't work at all,
1. I used sampling method to balance data and performance developed but as far as I know it should be by far better methods to solve imbalanced problem.
2. Moreover, libsvm can be used in weighted mode, but I do not know how use it and tune libsvm parameters like cost weight ,....
and how it can be used in metacost?
I'd appreciate if you help me