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Created February 15, 2019 06:01
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askjdj
##1. claculate entropy o the whole dataset
entropy_node = 0 #Initialize Entropy
values = df.play.unique() #Unique objects - 'Yes', 'No'
for value in values:
fraction = df.play.value_counts()[value]/len(df.play)
entropy_node += -fraction*np.log2(fraction)
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