[R] how to deal with singularities in lm()

Thomas Lumley tlumley at u.washington.edu
Tue Apr 9 17:26:25 CEST 2002

On Tue, 9 Apr 2002, Lukas Kubin wrote:

> Hash: SHA1
> I got the report
> Coefficients: (1 not defined because of singularities)
> while trying to get my model's coefficients from lm()
> What shall I do to avoid it and get the one missing coefficient?

It means that one of your coefficients can be computed as a linear
combination of the others.  Do that.


Thomas Lumley			Asst. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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