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finding specific conditional entropy (for calculating informationgain)
I am trying to learn how to calculate information gain, and have hit a brick wall. Gain(Y,X) = entropy(Y) - entropy(Y|X) The first term, entropy(y), is easy. But, the entropy(Y|X) is the problem... so entropy(Y|X) = SUM (prob[x] * entropy(Y|X = x)), over all values of Y. But what is...- ssjalakazam
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- Forum: Data Warehousing/Big Data
