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

From: Duncan Murdoch <murdoch_at_stats.uwo.ca>
Date: Fri 05 Aug 2005 - 22:15:59 EST

Peter Dalgaard wrote:
> 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.

Remember the old joke.

The patient to his doctor: "It hurts when I do this."

The doctor: "So don't do that."

Duncan Murdoch



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