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Outline the major steps of decision tree classification. (in your own words and references please)

Outline the major steps of decision tree classification. (in your own words and references please)

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1) Decision tree Classification uses ID3 Algorithm without any backtracking and using the Entropy and information gain to build the decision tree

2) Entropy :

a) Calculate the Entropy from the root nodes, According to the entropy build the decision tree

b) entropy = -plogp-qlogp

3) Information Gain :

a) Calculate the Information gain for the every attribute that returns the high value

b) Gain( x, y) = entropy(x) - entropy(x, y)

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