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Re: machine precision [message #66502 is a reply to message #66501]

Mon, 18 May 2009 06:55

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Mon, 18 May 2009 07:30:42 -0600, David Fanning <news@dfanning.com>
wrote:

> I think the MACHAR values *do* reflect this. But the point
> is, when you compare two numbers that are nearly equal
> to each other, the *difference* can easily happen in
> the significant digits that can be garbage (or, rather,
> undefined) in a floating point number. That is to say,
> the difference can be in the part of the number that is
> beyond the realm of floating point accuracy.

If "the difference is in the garbage", isn't it lower than
(machar()).eps ? In the example, it's higher.

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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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