[SciPy-Dev] Need some help to wrap the cubature package in scipy/integrate

Saullo Castro saullogiovani@gmail....
Sat Aug 24 08:51:45 CDT 2013


Just to update you guys,

since the matter regarding the Cubature license incompatility is not
closed, I decided to move the wrapper development from my scipy forked
repository to a new one. Here is the link:

https://github.com/saullocastro/cubature

if you wish to keep track of it. The wrapper is working so far and now I
will start writing all the testing functions, some scripts for benchmarking
and the documentation.

Please, let's try to include it in scipy/integrate.


Greetings,
Saullo


2013/8/23 <scipy-dev-request@scipy.org>

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> Today's Topics:
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>    1. Re: Loss of precision using lsoda f2py interface or ode   class
>       (Joris Vankerschaver)
>    2. Re: Need some help to wrap the cubature package in
>       scipy/integrate (Nathan Woods)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 23 Aug 2013 14:56:49 +0200
> From: Joris Vankerschaver <jvankers@gmail.com>
> Subject: Re: [SciPy-Dev] Loss of precision using lsoda f2py interface
>         or ode  class
> To: SciPy Developers List <scipy-dev@scipy.org>
> Message-ID: <504DC808-6E3E-436B-A936-696B51834882@gmail.com>
> Content-Type: text/plain; charset=us-ascii
>
> On 23-aug-2013, at 02:15, Juan Luis Cano wrote:
> > I fear odeint/ode bugs are starting to pile up (gh-1567, gh-1801,
> > gh-1976, gh-2515, gh-2570), and as many have suggested in the past a
> > rewrite or redesign would be quite helpful.
>
> This may have been pointed out before, but one inconsistency that should
> be fixed in an eventual redesign is that scipy.integrate.ode expects an RHS
> of the form `f(t, y0, ...)` whereas odeint expects an RHS with the first
> two parameters reversed, i.e. of the form `f(y0, t, ...)`. The former
> convention is the standard in Matlab and Sage.
>
> All the best,
> Joris
>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 23 Aug 2013 10:22:01 -0600
> From: Nathan Woods <charlesnwoods@gmail.com>
> Subject: Re: [SciPy-Dev] Need some help to wrap the cubature package
>         in      scipy/integrate
> To: SciPy Developers List <scipy-dev@scipy.org>
> Message-ID: <-1837672449859755872@unknownmsgid>
> Content-Type: text/plain; charset="iso-8859-1"
>
> We just had a multidimensional integrator (nquad) wrapped into the latest
> beta version of scipy. How does cubature compare? I've been kicking around
> the idea of improving the speed of nquad by moving more of the code to a
> compiled language. How would that compare?
>
> Nate
>
>
> On Aug 23, 2013, at 5:35 AM, Saullo Castro <saullogiovani@gmail.com>
> wrote:
>
> I am wrapping the Cubature package for multi-dimensional integration that
> supports vector-valued functions and offers both fixed and adaptive
> integration schemes.
>
> Please, see more details here:
> http://ab-initio.mit.edu/wiki/index.php/Cubature
>
> I've forked the scipy repository and my current attempt can be directly
> accessed here:
>
>
> https://github.com/saullocastro/scipy/blob/master/scipy/integrate/_cubature.pyx
>
> When compiling the cython code I am getting the error:
>
> _cubature.obj : error LNK2019: unresolved external symbol hcubature
> referenced in function __pyx_pf_9_cubature_fhcubature
> C:\usr\scipy\scipy\integrate\_cubature.pyd : fatal error LNK1120: 1
> unresolved externals
> error: command 'link.exe' failed with exit status 1120
>
> Could you please have a look?
>
> Thank you very much!
> Saullo
>
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