Re: [Help-glpk] glpk and R (using SWIG)

[Nigel Galloway]

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.
> >

>


-- 
_______________________________________________
Surf the Web in a faster, safer and easier way:
Download Opera 9 at http://www.opera.com