[R-sig-dyn-mod] Jacobian in compiled code

[John Harrold]

Hello Daniel,

If you download this zip file:


It has an implementation of this model:




On Fri, Apr 10, 2015 at 2:22 AM daniel kaschek <
daniel.kaschek at physik.uni-freiburg.de> wrote:

> Which integrator did you use? If you don't mind, could you share the
> equations?
>
> Cheers,
> Daniel
>
> On Friday, April 10, 2015 6:38:57 AM CEST, John Harrold wrote:
> > Daniel and Thomas,
> >
> > I got it implemented and it is much faster.
> >
> > Thanks guys, I appreciate the help.
> >
> > John
> >
> > On Thu, Apr 9, 2015 at 8:08 AM Thomas Petzoldt <
> > thomas.petzoldt at tu-dresden.de> wrote:
> >
> >> Hello,
> >>
> >> the Jacobian is optional, so you can safely omit it. However, specifying
> >> the Jacobian (or at least its structure) can speed up the integration of
> >> the odepack solvers, e.g. for 1D, 2D and 3D systems. The Runge-Kutta
> >> solvers don't use the Jacobian.
> >>
> >> More, see help files ?lsoda ?lsode etc.
> >>
> >> Thomas
> >>
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> >>
> >
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> >
>
>
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