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MathGroup Archive 2002

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Re: Need to evaluate functions of the form y=5e+5 x1+2e-1x2, etc., were e means 10^

  • To: mathgroup at smc.vnet.net
  • Subject: [mg36881] Re: Need to evaluate functions of the form y=5e+5 x1+2e-1x2, etc., were e means 10^
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 1 Oct 2002 04:44:57 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <an68a1$s3$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,


str = "5e+5x1+2e-1x2";
StringJoin[Characters[str] /. "e" -> "*10^"] // ToExpression


??

Work fine for me.
But this type of output is typical generated by a C/FORTRAN
Program and you should rewrite the formating rules in
the code that produce this output.

Regards
   Jens

Chuck wrote:
> 
> Hello,
> 
> I have an odd problem.  I need to use and simplify functions that have
> been provided by a piece of software that insists on outputing the
> functional results of a data mining proceedure, using "e" when
> outputing numbers in scientific notation.
> 
> I'm having difficultly using Replace, Hold, etc. to correctly evaluate
> these types of function formats.  For example, y = 5e+5x1+2e-1x2,
> should be transcribed into 5 10^5 x1 + 0.2 x2.
> 
> Thanks,
> 
> Chuck


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