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Re: [Help-glpk] glpk and R (using SWIG)
From: |
Nigel Galloway |
Subject: |
Re: [Help-glpk] glpk and R (using SWIG) |
Date: |
Thu, 17 Jun 2010 15:56:56 +0100 |
I assume you are creating objects in GLPK, like say a constraint matrix. Do you
rely on Java's garbage collector to dispose of these or do you call glpk's
delete function (glp_delete_prob)? I do the latter. I don't recall ever
noticing R's garbage collector.
So don't use carrays. I use iajaar or sparse matrix from coin. See:
http://www.mail-archive.com/address@hidden/msg02581.html
I always think that writing ia[x] = etc; ja[x] = etc; ar[x] = etc; is tedious.
GLPK should have an add triplet function. Until then use iajaar.
> ----- Original Message -----
> From: Xypron <address@hidden>
> To: Nigel Galloway <address@hidden>
> Cc: "Eagle, Ken" <address@hidden>, address@hidden
> Subject: Re: [Help-glpk] glpk and R (using SWIG)
> Date: Wed, 16 Jun 2010 00:36:54 +0200
>
>
> Hello Nigel,
>
> the SWIG documentation on
> http://www.swig.org/Doc1.3/R.html
> says:
>
> Currently the following features are not implemented or broken:
> * Garbage collection of created objects
> * C Array wrappings
>
> Some sort of array wrapping is needed for using GLPK.
>
> Best regards
>
> Xypron
>
> Nigel Galloway wrote:
> > The benefits (and drawbacks of SWIG) have been widely discussed.
> > Using the swig interface files discussed it is possible to
> > produce wrappers for all glpk api in R, and add a few usful
> > features.
> >
>
--
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