(Q17083041)

English

Information gain in decision trees

Gain from observing another random variable

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information theory

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defining formula

IG(T,a)=H(T)-H(T|a)

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IG(T,a)=H(T)-\sum _{v\in vals(a)}{\frac {|\{{\textbf {x}}\in T|x_{a}=v\}|}{|T|}}\cdot H(\{{\textbf {x}}\in T|x_{a}=v\})

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WikiProject Mathematics

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Wikipedia(5 entries)

arwiki اكتساب المعلومات (شجرة القرار)
enwiki Information gain (decision tree)
fawiki کسب اطلاعات (درخت تصمیم)
kowiki 정보 이득
simplewiki Information gain in decision trees

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