Message-ID: <x23bpoip0y.fsf@turmalin.kubism.ku.dk>
Date: 2005-08-05T11:47:25Z
From: Peter Dalgaard
Subject: How to set the floating point precision beyond e-22?
In-Reply-To: <42F34352.6070504@stats.uwo.ca>
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 ??ster 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