Feature request: Box-Cox Transformation

[richards99]

Please can a node be added to undertake a Box-Cox transformation to help reduce the amount of Skew in datasets.

Thanks,

Simon.

[ScottF]

Hi @richards99 -

Nice idea! What would you think about having Box-Cox as an additional transformation option in the Normalizer node? I can write up an enhancement ticket and add your request as a +1.

(EDIT: Internal reference AP-13756)

[izaychik63]

Box-Cox is one of the recommended transformation for skewed distributions. @ScottF, you can add another 1 for me.

Thank you

[ScottF]

It occurs to me that if this were implemented in the Normalizer node that we’d also need to include appropriate caveats, since there’s no guarantee that applying Box-Cox will result in a a distribution close to normality. But still, it’s such a common transform that I think that’s OK

[richards99]

Thanks for considering the request.

If you add it to the normaliser node, please also consider adding a winsoriser function.
I know I’m pushing my luck, but if I don’t ask, I don’t get!!

Simon.

[richards99]

I’m thinking a de-skew node maybe better than adding it to the normaliser.