Re: Eigensystem
- To: mathgroup at smc.vnet.net
- Subject: [mg73322] Re: [mg73309] Eigensystem
- From: "Christoph Lhotka" <lhotka at astro.univie.ac.at>
- Date: Mon, 12 Feb 2007 05:02:37 -0500 (EST)
Dear Vadim!
Eigensystem gives you the result in the accuracy you specify as input. So just
try e.g.
In[.]:=Eigensystem[{{1`50, 2}, {3, 4}}]
which will give you the eigensystem up to 50 digits.
1. is by default MachinePrecision (try Precision), 1`N is a N-th digit
precision number. The result will always be of the lowest precision given in
the input line.
best regards,
Christoph
PS: This is a fundamental principle in any Mathematica function.
On Sun, 11 Feb 2007 01:14:28 -0500 (EST)
"Vadim N. Smelyanskiy" <vadim at email.arc.nasa.gov> 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
>
>
>
-- Mag. Christoph Lhotka --
University of Vienna / Department of Astronomy
Tuerkenschanzstrasse 17, A-1180 Vienna, Austria
fon. +43 (1) 4277 51841
mail. lhotka at astro.univie.ac.at