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Dan19
Calcite | Level 5 Dan19
Calcite | Level 5

Gini statistic in Interactive binning node

Posted 07-18-2023 03:23 PM (1894 views)

Hello!
I am reading SAS documentation regarding  Interactive binning node. I saw the formula of Gini statistic (image attached). The Gini formula seems not to be standard one. So, it's interesting to me how this formula is derived, and is there a link to, e.g. an article, which explains this formula? Or can someone explain it?
Thanks!Screenshot from 2023-07-19 01-21-28.png

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ballardw
Super User ballardw
Super User

Re: Gini statistic in Interactive binning node

Posted 07-18-2023 04:05 PM (1882 views)  |   In reply to Dan19

I suggest also providing a similar link to what you consider the "standard".

It is not impossible that the one in the SAS documentation is equivalent just different calculation order or expression.

 

Caveat: not any expertise in Gini but some experience with alternate calculation methods.

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  • ‎07-18-2023 03:23 PM
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