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MathGroup Archive 2006

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Re: What does " 1.' " mean ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66704] Re: [mg66661] What does " 1.' " mean ?
  • From: "Chris Chiasson" <chris at chiasson.name>
  • Date: Sat, 27 May 2006 03:52:51 -0400 (EDT)
  • References: <200605260817.EAA01766@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

1

means you are looking at an exact number with a nominal value of 1
(infinite precision & accuracy)

1.`

means you are looking a a machine precision number with a nominal value of 1

1.2`23

means you are looking at a number with a nominal value of 1.2 and 23
digits of precision

1.525``5

means you are looking at a number with a nominal value of 1.525 and 5
digits of accuracy

Mathematica gives its definition of precision and accuracy (which are
not independent) in section 3.1.4 of the Mathematica Book.

On 5/26/06, Arkalen <skizzir at yahoo.com> wrote:
> Warning : I am a complete newbie at using Mathematica.
>
> I have used NSolve to solve systems of non linear equations, and it gives
> me results which look good except they contain several "1.'abc" where abc
> are parameters. (that's "one period apostrophe").
> I assume it's shorthand notation for something but I can't tell what, the
> Mathematica experts I might ask are all gone for a week and I can't find
> it in the book.
>
> Anyone know what it means ?
>
>


-- 
http://chris.chiasson.name/


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