Box-Cox or Yeo-Johnson transform as a preprocessing step to FAMD

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Dylan Mann-Krzisnik

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Jul 16, 2021, 12:34:25 PM7/16/21
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Hello FactoMineRers,

I am currently experimenting with FactoMineR's FAMD model for mixed categorical and quantitative data. I remember reading that FactoMineR commands will ensure a centred unit-variance normalization of the data.

I was wondering whether performing power transforms such as Box-Cox or Yeo-Johnson was also advised as a preprocessing step? I tend to use these transforms on quantitative variables when the data is non-Gaussian, but perhaps this is not advised for FAMD?

Also, if power transforms are advised, should they be performed prior or following data imputation?

Thank you,

Dylan
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