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Re: [Help-gsl] Solving coupled ode's with gsl_odeiv

From: Brian Gough
Subject: Re: [Help-gsl] Solving coupled ode's with gsl_odeiv
Date: Sun, 13 Jan 2008 22:01:16 +0000
User-agent: Wanderlust/2.14.0 (Africa) Emacs/22.1 Mule/5.0 (SAKAKI)

At Fri, 11 Jan 2008 12:01:42 -0000 (GMT),
address@hidden wrote:
> I have been using h=1e^-6 and control =
> gsl_odeiv_control_y_new(1*e^-6,1*e^-6).
> I have used this method quite before with 77 coupled ode's and not had
> such a problem. In that case the initial conditions were all under 100.
> I have tried each of the rk stepping functions, with rkck being the
> quickest but still taking more than three minutes.
> Is there anything I can do to increase the speed for large initial
> conditions?


You can look at the step-size and error to see what is going on.
Maybe the tolerance is too strict, for example.

Brian Gough

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