[R] Mass: lda and collinear variables

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From: Till Baumgaertel (till.baumgaertel@epost.de)
Date: Mon 24 Feb 2003 - 12:41:13 EST


Message-id: <3E596C8D0000000D@PPD27104.x.de>

hello list,

when I use method lda of the MASS package I experience a warning:
variables are collinear in: lda.default(data[train, ], classes[train])

Is there an easy way to recover from this issue within the MASS package?
Or how can I tell how severe this issue is at all?

I understand that I shouldn't use lda at all with collinear data and should
use "quadratische" (squared?) discr. analysis (by Welch) instead. Or is
this wrong? Could I do this in R?

Thanks four your help,
Till Baumgärtel

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