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Re: machine precision [message #66501 is a reply to message #66499]

Mon, 18 May 2009 07:02

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Mon, 18 May 2009 13:33:48 GMT, James Kuyper
<jameskuyper@verizon.net> wrote:

> At a minimum, you should use pres*(f1^2+f2^2)^0.5 instead of pres for
> the following comparison. eps gives you the relative precision, not the
> absolute precision; it needs to be scaled by the numbers you're working
> with.

Now this I didn't realize! So it's the precision of the mantisse or
something?

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[Message index]

		Re: machine precision By: Wout De Nolf on Wed, 20 May 2009 06:08
		Re: machine precision By: Carsten Lechte on Wed, 20 May 2009 03:44
		Re: machine precision By: jameskuyper on Wed, 20 May 2009 03:28
		Re: machine precision By: Carsten Lechte on Wed, 20 May 2009 01:46
		Re: machine precision By: David Fanning on Tue, 19 May 2009 20:01
		Re: machine precision By: jameskuyper on Tue, 19 May 2009 18:41
		Re: machine precision By: Kenneth P. Bowman on Tue, 19 May 2009 11:15
		Re: machine precision By: jeffnettles4870 on Tue, 19 May 2009 08:16
		Re: machine precision By: jameskuyper on Mon, 18 May 2009 18:44
		Re: machine precision By: Wout De Nolf on Mon, 18 May 2009 07:02
		Re: machine precision By: Wout De Nolf on Mon, 18 May 2009 06:55
		Re: machine precision By: jameskuyper on Mon, 18 May 2009 06:33
		Re: machine precision By: David Fanning on Mon, 18 May 2009 06:30
		Re: machine precision By: Wout De Nolf on Mon, 18 May 2009 06:04
		Re: machine precision By: David Fanning on Mon, 18 May 2009 04:53

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