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

[glpk xypron]

Hello Nigel,

I suggest you set up a project on www.sourceforge.net.

There you have subversion for your code and you can easily
make binary or source releases.

Furthermore you get webspace for describing your project(s).

If that is too much trouble, I can upload the file
to the GLPK-Java site.

Best regards

Xypron.


-------- Original-Nachricht --------
> Datum: Tue, 22 Jun 2010 14:55:40 +0100
> Betreff: Re: [Help-glpk] glpk and R (using SWIG)
> 
> The bad news is I think these examples are lost to history.
> 
> The good news I have some better ones. Do you think the new wiki is a good
> place for them? Hopefully it will take better care of them than Yahoo did
> the old ones.
> 
> > ----- Original Message -----
> > Subject: Re: [Help-glpk] glpk and R (using SWIG)
> > Date: Thu, 17 Jun 2010 22:17:04 +0200
> > 
> > 
> > Hello Nigel,
> > 
> > the proposed iajaar.h looks promising.
> > 
> > Unfortunately the referenced download site
> > http://www.geocities.com/nigel_galloway/IAJAAR.zip
> > no longer exists.
> > 
> > Is there an alternative site?
> > 
> > > Do you rely on Java's garbage collector to dispose of these or do
> > > you call glpk's delete function (glp_delete_prob)?
> > Glp_delete_prob() only deletes objecst created by GLPK. GLPK-Java
> > relies on garbage collection for other objects like instances
> > of SWIGTYPE_p_double.
> > 
> > Best regards
> > 
> > Xypron
> > 
> > -------- Original-Nachricht --------
> > > Datum: Thu, 17 Jun 2010 15:56:56 +0100
> > > Betreff: Re: [Help-glpk] glpk and R (using SWIG)
> > 
> > >
> > > 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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