Write code to calculate the information gain.SplitDataSet function is used to select the feature subset, such as the choice of age (0) young (0), we can call splitDataSet (dataSet, 0, 0) returns a subset of the five data sets is the age of youth. ChooseBestFeatureToSplit is a function that selects the best features.

Filename	Size	Update
jiqixuexi	0	2018-03-11
jiqixuexi\.idea	0	2018-03-11
jiqixuexi\.idea\inspectionProfiles	0	2018-03-11
jiqixuexi\.idea\inspectionProfiles\profiles_settings.xml	228	2018-03-11
jiqixuexi\.idea\jiqixuexi.iml	474	2018-03-11
jiqixuexi\.idea\misc.xml	228	2018-03-11
jiqixuexi\.idea\modules.xml	270	2018-03-11
jiqixuexi\.idea\workspace.xml	30521	2018-03-11
jiqixuexi\day1	0	2018-03-11
jiqixuexi\day1\ID3.py	6266	2018-03-11
jiqixuexi\day1\Sklearn-Decision.py	2028	2018-03-11
jiqixuexi\day1\tezhen.py	1892	2018-03-11
jiqixuexi\day1\treePlotlib.py	6487	2018-03-11
jiqixuexi\day1\trees.py	7542	2018-03-11
jiqixuexi\day1\xinxishang.py	4328	2018-03-11
jiqixuexi\day1\zz.py	7217	2018-03-11

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