From: Brian Gough <bjg@network-theory.co.uk>
To: Di Xiao <dxiao@physics.utexas.edu>
Cc: Slaven Peles <peles@cns.physics.gatech.edu>,
<gsl-discuss@sources.redhat.com>
Subject: Re: Questions on bsimp
Date: Tue, 06 Aug 2002 10:42:00 -0000 [thread overview]
Message-ID: <15694.64134.858729.222884@debian> (raw)
In-Reply-To: <Pine.LNX.4.33.0208021040270.18244-100000@linux11.ph.utexas.edu>
Di Xiao writes:
> However, I still have a question. We use adaptive stepzie control
> because we want to deduce the computational effort. The algorithm
> should be smart to know at which region there is the smooth
> uninteresting curve, while in some region many small steps are
> needed. My question is why bsimp chose some unreasonably big steps
> in my code. It can jump from one period to another period without
> showing the details of each one. If you run the code, you will
> find from the results givin by bsimp, it is hard to tell what
> function it likes. I tried different gsl_odeiv_control, but none of
> them gave me good results. I guess the reason is when there are
> oscillations, bsimp is not a good one. Can anybody explain it?
Bsimp can take very large steps and still be highly accurate. See the
reference to the paper in the manual for details.
next prev parent reply other threads:[~2002-08-06 17:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E17aJO1-0002pB-00@kaos.physics.gatech.edu>
2002-08-02 8:53 ` Di Xiao
2002-08-06 10:42 ` Brian Gough [this message]
2002-08-01 10:13 Slaven Peles
-- strict thread matches above, loose matches on Subject: below --
2002-08-01 9:19 Di Xiao
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