Re: GSoC 2016 project idea - implementation of ode15s

[Richard Crozier]

On 07/03/16 17:33, Carlo De Falco wrote:
> On 7 Mar 2016, at 16:44, Richard Crozier <address@hidden> wrote:
> > Well I was thinking it is quite hard, but that might be more of reflection of 
> > myself than the project.
>
> yes, you are right it is a non trivial project, but you should consider that the
> library we proposed to use as a backend already implements exactly the same 
> algorithm as
> ode15s.
>
> > It seems quite hard to do a lot more than get a really good and well tested 
> > implementation of ode15s, with all the features such as event detection and 
> > documentation. However, maybe a lot of the code exists already, I don't know 
> > the detail of the ode solver implementations and how much can be reused.
>
> sundials has all that and even more, there is no need to reuse code just write 
> a good interface.
> that said, I admit it is definitely not a trivial task to add yet another 
> external dependency
> library to core...
>
> there will be a lot of difficulties with stuff such as writing DLD_FUNs, using 
> mercurial, making
> autotools tests, etc.
>
> would you like / have time to contribute to mentoring this part of the work, if 
> we find a good student?

Yes I'm willing to help with the 'boilerplate' work, I am familiar with 
autotools, mercurial, building Octave and have had a few patches 
accepted to Octave core. I'm very motivated to get ode15s implemented in 
Octave.

I'll be much more useful in fact if most of the actual numerical 
implementation already exists and the project is mostly just making this 
accessible in Octave. Sounds like you know jwe would be fine with the 
dependencies. One thing I haven't done in the past is DLD_FUNs, since I 
usually go with mex for Matlab compatibility, but happy to learn about 
this too.

Richard

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