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

[John Harrold]

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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