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Information Gain Calculator

person_outlinePatrick Sorschedule2019-09-25 06:20:03
Creative Commons Attribution/Share-Alike License 3.0 (Unported)

This content is licensed under Creative Commons Attribution/Share-Alike License 3.0 (Unported). That means you may freely redistribute or modify this content under the same license conditions and must attribute the original author by placing a hyperlink from your site to this work https://planetcalc.com/8403/. Also, please do not modify any references to the original work (if any) contained in this content.

Is use in decision tree.
Formula as below:

def two_group_ent(first, tot):
return -(first/totnp.log2(first/tot) +
(tot-first)/totnp.log2((tot-first)/tot))

tot_ent = two_group_ent(10, 24)
g17_ent = 15/24 two_group_ent(11,15) +
9/24 two_group_ent(6,9)

answer = tot_ent - g17_ent

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Creative Commons Attribution/Share-Alike License 3.0 (Unported) PLANETCALC, Information Gain Calculator

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