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How to weight a given class? [class balancing] #1596

@UnixJunkie

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@UnixJunkie

Is it possible to give a list of weights that should be tried for a given class?
I have some data where very heavy reweighting of the under-represented class is necessary to get any good classifier.

I don't know in advance what is the weight to use; apparently it depends of the ML being used.
So, this is another hyper parameter that needs to be optimized.

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