Re: Preserve natural number "e" using N or SetPrecision
- To: mathgroup at smc.vnet.net
- Subject: [mg30823] Re: Preserve natural number "e" using N or SetPrecision
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 20 Sep 2001 03:51:15 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <9o973r$cfd$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
NSaveE[expr_, prec___] := Block[{E = ee},
N[expr, prec]
] /. ee -> E
will do it.
Regards
Jens
Guillermo Sanchez wrote:
>
> When it is used N or SetPrecision in expresions involving the natural
> number "e" Mathematica gives the output showing "e" as a numeric value
> i.e:
>
> int[]:=N[0.19884 Exp[-2.0000000037 t], 5]
>
> out[]:=0.19884 2.71828^(-2. t)
>
> or
>
> int[]:=SetPrecision[0.19884 Exp[-2.0000000037 t],3]
>
> out[]:=0.199 2.72^(-2. t)
>
> But I wish see in the output the simbolic notation of "e" better than
> the numeric value. Any help?