Re: R discriminant analyses

From: Anne B Dufour (
Date: Fri Jan 28 2005 - 09:49:21 MET

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    Hello Mary

    "dudi" means "duality diagram". It is the basis of all the data analyses
    and was proposed by Yves Escoufier in 1987 : "The duality diagram : a means
    for better practical applications" in L., Legendre P. & Legendre,
    Development in numerical ecology, Berlin, Springer-Verlag.

    At this moment, in R-ade4, you can find seven duality diagrams. The
    schedule of ade4 for one-table study is described in a paper from R-news,
    vol 4, issue 1, 2004: Chessel, D.; Dufour, A.B.; Thioulouse, J. "The ade4
    package - I: One-table methods".

    In the examples proposed at the end of the function "discrimin", the
    duality diagram is a normed principal component analysis.
    The choice of a duality diagram is especially linked to your own problem
    and dataset.

    Good work

    Anne B Dufour

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