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What is the purpose of the Operator "Normalize"?
my teacher explained today that we should only use the Operator "Normalize Z-Score" if we only have numeric attributes and the "Normalize MinMax" if we have mixed attributes (numeric, nominal and binominal). I don't really understood when to use those different Operators. He mentioned to use it, if the Min or Max value difference is too high, but what exactly is the purpose of the Normalize Operator? When do we actually need it? What exactly is it doing?
Thanks in advance!