Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2000
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2000

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: NDSolve Interpolating Function Range too small!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg26351] Re: [mg26344] NDSolve Interpolating Function Range too small!
  • From: Reza Malek-Madani <research at usna.edu>
  • Date: Wed, 13 Dec 2000 02:41:13 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

I would imagine you are hitting a singularity at 10^(-30) if Mathematica
is not giving you other warnings. If you send me the equations, I would be
happy to play with them and report back what I find. Reza.   



-------------------------------------------------------------------------
Reza Malek-Madani               Director of Research
Research Office, MS 10m         Phone: 410-293-2504 (FAX -2507)
589 McNair Road                 DSN:      281-2504
U.S. Naval Academy              Nimitz Room 17 in ERC
Annapolis MD 21402-5031         Email: research at usna.edu

--------------------------------------------------------------------------


On Tue, 12 Dec 2000 flashboltzmann at my-deja.com wrote:

> I'm using NDSolve to numerically solve three very complicated second
> order differential equation. When NDSolve does the calculation though
> the interpolating function always has a range in the 10^-30 something
> range. This is useless when I try to plot the solutions to the equation
> because I need it on a range of up to 100. How do I tweak mathematica
> (or my equation) to get a decent range from the interpolating function?
> Also, when I am plotting is there any way to tell mathematica not to
> extrapolate a solution if it hits an undefined point?
> 
> 
> Sent via Deja.com http://www.deja.com/
> Before you buy.
> 
> 



  • Prev by Date: Bug in Package Graphics`Graphics` ?
  • Next by Date: Re: Simplify for ca^2+sa^2==1
  • Previous by thread: Re: NDSolve Interpolating Function Range too small!
  • Next by thread: BarChart, Bar Labels disappear