Groups > comp.soft-sys.math.mathematica > #16707

Re: standard floating point arithmetic in Mathematica?

From	Richard Fateman <fateman@cs.berkeley.edu>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Re: standard floating point arithmetic in Mathematica?
Date	2014-03-29 06:15 +0000
Message-ID	<lh5odj$4n4$1@smc.vnet.net> (permalink)
References	<lh0pbt$m4l$1@smc.vnet.net>
Organization	Time-Warner Telecom

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On 3/27/2014 2:00 AM, Alan wrote:
> I would like to illustrate some limitations with floating point
> calculations.  Can I force Mathematica to do floating point
> computations at a standard float size and the display the full
> results (as the same size float)?
>
> E.g., if I enter 0.1+0.2 I would like to see 0.30000000000000004
>
> Thanks, Alan Isaac
>

If you are looking at the IEEE 754 binary standard, you would
probably be better off looking at the hexadecimal representation
because the decimal conversion adds complications and
sometimes mystery.

There is (or used to be) a floating point calculator online
that provided these operations. I can't spot it right now, but it
provided single/double  hex/binary/decimal   add/mult etc.

It seems to me that Mathematica had some kind of package to extract
fraction/exponent etc from IEEE numbers, and I expected someone
to point this out.

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Thread

standard floating point arithmetic in Mathematica? Alan <alan.isaac@gmail.com> - 2014-03-27 09:00 +0000
  Re: standard floating point arithmetic in Mathematica? "Nasser M. Abbasi" <nma@12000.org> - 2014-03-28 07:31 +0000
  Re: standard floating point arithmetic in Mathematica? Kevin <kjm@KevinMcCann.com> - 2014-03-28 07:31 +0000
  Re: standard floating point arithmetic in Mathematica? David Reiss <dbreiss@gmail.com> - 2014-03-28 07:30 +0000
  Re: standard floating point arithmetic in Mathematica? Richard Fateman <fateman@cs.berkeley.edu> - 2014-03-29 06:15 +0000
  Re: standard floating point arithmetic in Mathematica? David Annetts <david.annetts@iinet.net.au> - 2014-03-30 08:42 +0000

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