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

Peter Dalgaard p.dalgaard at biostat.ku.dk
Fri Aug 5 13:47:25 CEST 2005


Duncan Murdoch <murdoch at 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             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907




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