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## Re: [Help-gsl] ode equation definition

**From**: |
Frank Reininghaus |

**Subject**: |
Re: [Help-gsl] ode equation definition |

**Date**: |
Wed, 17 Dec 2008 23:12:01 +0100 |

**User-agent**: |
KMail/1.10.3 (Linux/2.6.27-9-generic; KDE/4.1.3; i686; ; ) |

Hi,
could you post your code here? Without the source, it's hard to tell what went
wrong.
Cheers
Frank
On Tuesday 16 December 2008 15:58:20 Gary Paterson wrote:
>* I'm trying to use the gsl to solve an ode which I can't define simply.*
>* My aim is to define the ode by calling inside the int (* function)*
>* (double t, const double y[], double dydt[], void * params) function*
>* other functions. These functions will need to take in as parameters t,*
>* and y(t).*
>
>* I've tried doing this by inside the int (* function) (double t, ...*
>* function converting y[0] into a double and passing the resulting value*
>* and the value for t to the other functions. My attempt must be wrong*
>* however as the result for the conversion of y[0] is nan on all but the*
>* first call to int (* function) (double t, ... .*