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Reducing a Dataset on an Attribute
i wanna measure the influence of an certain attribute on a class. The problem is that this attribute has 2 instancetypes (A and and that A occures 80% and B occures 20 %. I want to filter that Data set to get approx. 20 % and 20 % occurences of A and B (randomly choosen).
Does anyone knows a Operator-Combination that can reduce the Data set, only having 20 % A and 20 % B?
thanks in advance