Re: [R] How to set the floating point precision beyond e-22?

From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>
Date: Fri 05 Aug 2005 - 21:47:25 EST

Duncan Murdoch <murdoch@stats.uwo.ca> writes:

>
> You will have to find a different solution to the problem. To machine
> precision, that matrix looks singular. This usually indicates that it's
> not the right matrix to try to invert.

It might be a scaling issue though: If you're measuring age in days and hormone concentrations in Molar, then you'll get that sort of eigenvalue ratios in a fairly benign way.

-- 
   O__  ---- Peter Dalgaard             ุster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)                  FAX: (+45) 35327907

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Received on Fri Aug 05 21:54:59 2005

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