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Add inverse hyperbolic sine transform to preProcess #56

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zachmayer opened this issue Oct 6, 2014 · 1 comment

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zachmayer commented Oct 6, 2014

It's the honey badger of transformations. Very similar to box-cox or log transforms, but handles 0's and negative values smoothly:

http://worthwhile.typepad.com/worthwhile_canadian_initi/2011/07/a-rant-on-inverse-hyperbolic-sine-transformations.html

http://mathworld.wolfram.com/InverseHyperbolicSine.html

zachmayer added the enhancement label

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topepo added a commit that referenced this issue


          added IHS transformation for issue #56

ae96659

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topepo commented Sep 3, 2016

finally got around to working on this. Please test.

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