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Re: [Help-gsl] ODE fail

From: Richard Harke
Subject: Re: [Help-gsl] ODE fail
Date: Sat, 19 Sep 2015 09:52:52 -0700

Thanks for your reply.
I have found it. My mistake, hstart was way too large. Now I'm only puzzled
the failure mode was rather obscure.

On Sat, Sep 19, 2015 at 3:55 AM, Juan Pablo Amorocho D. <address@hidden>

> Richard-
> I agree with Matthias. You'll need to provide us with your source code,
> and the GSL version, if you want us to help you.
> - Juan
> 2015-09-18 19:38 GMT+02:00 Richard Harke <address@hidden>:
>> I have a set of ODE's I'm trying to solve. After I installed gsl, I built
>> and ran
>> the example, vanderpol.c. No problem. I then changed func and jac for my
>> problem, changed the number of eqs. to 4. The output was simply the
>> initial values repeated over and over. I put beak points in func and jac.
>> They are never called!? Is there possibly some simple explanation or am
>> I doomed to slog through the library code to find this?
>> The eqs are:
>> dx/dt =xdot
>> dy/dt = ydot
>> d(xdot)/dt = a function of x, y,xdot, ydot
>> d(ydot)/dt = a function of x, y, xdot, ydot
>> Thanks for any suggestion

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