[R] what family of orthogonal polynomials is used in the function poly() ?

From: Marie Charru <Marie.Charru_at_engref.agroparistech.fr>
Date: Mon, 28 Mar 2011 10:04:29 +0200

Dear all,

I would like to know what family of orthogonal polynomials is used in the function poly(). I am using poly(X, 2) in a PLS regression, and I need the formula used to calculate the orthogonal polynomials to get back to the effect of the X variable. The reference cited in the help page for poly() is not available in my institution, and I would appreciate any indication or reference on the family used.

Thanks for your help,


PhD student
UMR 1092 INRA/AgroParisTech - ENGREF
Wood Ressource Laboratory (LERFoB)- team Forest Ecology 
14, rue Girardet - CS 14216   -  54042 Nancy - France
Tel.:(+33)  - Fax.:(+33)

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Received on Mon 28 Mar 2011 - 08:38:45 GMT

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