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

Re: NDSolve - how to bypass safety chceck?

• To: mathgroup at smc.vnet.net
• Subject: [mg111310] Re: NDSolve - how to bypass safety chceck?
• From: "J. Batista" <jbatista800 at gmail.com>
• Date: Tue, 27 Jul 2010 04:17:04 -0400 (EDT)

Here is a possible answer to your question.  You can append the option
MaxSteps -> Infinity to the end of your NDSolve command line.  This will
allow NDSolve to use an unlimited number of steps in generating a solution.
Hopefully this helps.

Regards,
J. Batista

On Mon, Jul 26, 2010 at 6:39 AM, slawek <slawek at host.pl> wrote:

> I have got an DDE/ODE equation: for parameter d < 0.8 the solutions are
> non-chaotic, for d > 0.9 the solutions are chaotic.
>
> Mathematica NDSolve works fine for d < 0.8 .
>
> The problem is NDSolve has got a kind of "safety chceck" - for d > 0.9 it
> gives a warning "Maximum number of  ... steps reached at the point" - and
> gives no solution. I want to bypass the checking - and turn NDSolve to a
> dumb routine which gives any noise solution just to show that the solution
> is noisy, chaotic and so on.
>
> Obviously, it would be possible to use any programing language to implement
> an naive integration scheme. But I would like use an option in NDSolve, to
> avoid the change of the environment.
>
> Any suggestions, please?
>
> slawek
>
>
>
>