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

[daniel kaschek]

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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