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abansal
Posts: 9
Posted 19:59 Jul 21, 2009 |

Calculations were quite long. I have tried to do it correct upto best of my ability. Please check for the calculation error.

I have a typing error too. I mean "Body Temperature" where i used "Blood Type"

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Last edited by abansal at 20:01 Jul 21, 2009.
xieguahu
Posts: 50
Posted 22:01 Jul 21, 2009 |

The answer is same, but there is some calculation difference in split on Aerial Creature

 

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Last edited by xieguahu at 22:05 Jul 21, 2009.
hsankav
Posts: 18
Posted 19:22 Jul 24, 2009 |

I would like to know how to choose the root node is it randomly or is there any rule to select the root node

HelloWorld
Posts: 88
Posted 21:04 Jul 25, 2009 |

here is mine.. GX, it seems like you did something wrong on the entropy(D) calculation.. try to double check it again with my solution.. and let me know

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pratyush
Posts: 6
Posted 10:18 Jul 26, 2009 |
HelloWorld wrote:

here is mine.. GX, it seems like you did something wrong on the entropy(D) calculation.. try to double check it again with my solution.. and let me know

 

Hi Helloworld.

I have calculated the entropy for the Root set and got the same result as ankur and xieguahu has provided. I think You have missed a term while adding the entropies. there are only four terms here (i.e -0.5283 + -0.4644 + -0.4644 + -0.3876). I have used google calculator and Matlab and i got the 2.232 as the root set.   

HelloWorld
Posts: 88
Posted 10:32 Jul 26, 2009 |
pratyush wrote:
HelloWorld wrote:

here is mine.. GX, it seems like you did something wrong on the entropy(D) calculation.. try to double check it again with my solution.. and let me know

 

Hi Helloworld.

I have calculated the entropy for the Root set and got the same result as ankur and xieguahu has provided. I think You have missed a term while adding the entropies. there are only four terms here (i.e -0.5283 + -0.4644 + -0.4644 + -0.3876). I have used google calculator and Matlab and i got the 2.232 as the root set.   

hey pratyush,

yeah, i missed a term.. thanks! :P

HelloWorld
Posts: 88
Posted 23:53 Jul 26, 2009 |

Here's the update of my solution.. GX, i think you miscalculated the Aerial Creature.. But the result is still the same split..

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