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MathGroup Archive 2007

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Re: Eigensystem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg73338] Re: Eigensystem
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 13 Feb 2007 06:54:19 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <eqmcbn$bbe$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

run it on exact numbers ? Rationalize[] you floating point numbers

Eigensystem[
   Table[Random[], {5}, {5}] /. r_Real :> Rationalize[r, 10^(-32)]] //
  N[#, 32] &

??

Regards
   Jens

Vadim N. Smelyanskiy wrote:
> Dear Sir/Madam:
> 
>  
> 
> I am a user of Mathematica 5.2 for Windows.
> 
> Please can you advice me how to run Eigensystem function so that its result
> has precision (say 50)
> 
> that is much higher then the Machine Precision. 
> 
>  
> 
> Thank you
> 
> Vadim
> 
>  
> 
> Vadim N. Smelyanskiy, PhD
> 
> NASA Ames Research Center
> 
> Discovery and System Health Area
> 
> Intelligent Systems Division
> 
> Mail Stop 269-3
> 
> Moffett Field, CA 94035-1000
> 
> Tel.: 650-604-2261
> 
> Fax: 650-604-4036
> 
>  
> 


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