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203.3.4 How to Calculate Entropy for Decision Tree Split?

LAB: Entropy Calculation – Example

In previous section, we studied about  How Decision tree Splits works?

  • Calculate entropy at the root for the given population
  • Calculate the entropy for the two distinct gender segments

Code- Entropy Calculation

  • Entropy at root 100%
  • Male Segment : (-48/60)log(48/60,2)-(12/60)log(12/60,2)
  • 0.7219281
  • FemaleSegment : (-2/40)log(2/40,2)-(38/40)log(38/40,2)
  • 0.286397




The next post is about Information Gain in Decision tree Split.

20th June 2017
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