R help - Mar 2011 - what family of orthogonal polynomials is used in the function poly() ?

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,

Marie

-- 
Marie CHARRU
PhD student
UMR 1092 INRA/AgroParisTech - ENGREF
Wood Ressource Laboratory (LERFoB)- team Forest Ecology 
14, rue Girardet - CS 14216   -  54042 Nancy - France
Tel.:(+33)3.83.39.68.80  - Fax.:(+33)3.83.30.22.54


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