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MathGroup Archive 2005

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Re: precisions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg56015] Re: [mg55973] precisions
  • From: Chris Chiasson <chris.chiasson at gmail.com>
  • Date: Wed, 13 Apr 2005 01:11:03 -0400 (EDT)
  • References: <200504120926.FAA27673@smc.vnet.net>
  • Reply-to: Chris Chiasson <chris.chiasson at gmail.com>
  • Sender: owner-wri-mathgroup at wolfram.com

What is the actual precision of the input? Are you entering in
dimensions of beams, etc? I wonder what the gurus will say on the
subject of tracking precision through a set of calculations.

On Apr 12, 2005 5:26 AM, Tun Myint Aung <TMA at nus.edu.sg> wrote:
> 
> Hi All,
> 
>     I am doing a calculation involving eigenvalues and eigenvectors for
> structural mechanics. I encountered with difficulties in numerical
> calculation which is very sensitive to precisions of numerical numbers.
> I used "SetPrecision[inputdata,100] for my input data. But after I got
> eigenvalues and eigenvectors, these numbers are "MachinePrecision". I
> tried to change the precision in "Eigenvalues", but there are no options
> for that. How can I set the precision for the whole notebook?
> 
> With Regards,
> Tun Myint Aung (Graduate Student)
> Civil Engineering Department
> National University of Singapore
> E1A 02-18
> E-mail: g0202015 at nus.edu.sg (or) tma at nus.edu.sg
> 
> 


-- 
Chris Chiasson
Kettering University
Mechanical Engineering
Graduate Student
1 810 265 3161


  • References:
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      • From: "Tun Myint Aung" <TMA@nus.edu.sg>
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