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

From: Peter . Milner
Subject: [Help-gsl] Solving coupled ode's with gsl_odeiv
Date: Fri, 11 Jan 2008 12:01:42 -0000 (GMT)
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I have a set of 15 coupled ode's which I am solving with
gsl_odeiv_step_rk4. When I solve these ode's in Maple it only takes a
second for a couple of time steps. However using the gsl_odeiv_step_rk4
method it takes about 4 minutes. The initial conditions I have vary
between zero and 6 million.

I have been using h=1e^-6 and control =

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

Thanks for your time,

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