Re: On default numerical precision
- To: mathgroup at smc.vnet.net
- Subject: [mg90675] Re: On default numerical precision
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Sat, 19 Jul 2008 04:48:01 -0400 (EDT)
- Organization: Uni Leipzig
- References: <g5pj07$qbc$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
$Post = ( # /. a_Real :> NumberForm[a, {32, 16}]) &;
Regards
Jens
sergio_r at mail.com wrote:
> Hello all,
>
> I am wonderin on how to change the mathematica default printing
> precision, so I don't have to type on any defined constant the
> required precision, like " `30 " in:
>
> In[1]:= a=2.3`30; b=2.1`30;
>
> In[2]:= a*b
>
> Out[2]= 4.83000000000000000000000000000
>
> I would like to be able to do:
>
> a=2.3; b=2.1; and obtain
> a*b = 4.83000000000000000000000000000
>
> Regards,
>
> Sergio
> PS. Apparently the internal variable $Pre could be set to do that, but
> the respective help page [ http://reference.wolfram.com/mathematica/ref/$Pre.html
> ] is not clear about how to do that.
>