Message-ID: <42F3587F.5050803@stats.uwo.ca>
Date: 2005-08-05T12:15:59Z
From: Duncan Murdoch
Subject: How to set the floating point precision beyond e-22?
In-Reply-To: <x23bpoip0y.fsf@turmalin.kubism.ku.dk>
Peter Dalgaard wrote:
> 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.
Remember the old joke.
The patient to his doctor: "It hurts when I do this."
The doctor: "So don't do that."
Duncan Murdoch