Re: octave eigs function

[Ben Abbott]

On May 22, 2013, at 10:25 PM, Poulette Poulette wrote:

> De : Jordi Gutiérrez Hermoso <address@hidden>
> À : Poulette Poulette <address@hidden> 
> Cc : help octave <address@hidden> 
> Envoyé le : Mercredi 22 mai 2013 16h01
> Objet : Re: octave eigs function
> 
>> On 22 May 2013 08:06, Poulette Poulette <address@hidden> wrote:
>> > I have Octave version 3.6.4 for mac (osX 10.8.3).
>> 
>> How did you install it, Mme Poulette?
>> 
>> > I don't know how to use/obtain eigs function to calculate eigen vectors and
>> > eigenvalues.
>> 
>> You only need eigs if you're working with sparse matrices or if you
>> only want a few eigenvalues of your matrix. Otherwise you can use eig.
>> 
>> > The error is : "eigs: not available in this version of Octave"
>> 
>> However you obtained Octave, it looks like you compiled it without
>> ARPACK. You need to recompile Octave with ARPACK support.
>> 
>> - Jordi G. H.
> 
> I installed the octave-devel +atlas+docs through macports (I already have 
> Xcode, Xquartz, etc...).
> 
> "port installed" gives : arpack @3.1.2_1+accelerate+gcc47+openmpi (active)
> Thus I suppose Arpack to be installed...
> 
> Thanks

*** Please don't top post.  By replying at the bottom of the email, it is 
easier to follow the conversation ***

Looking at the portfile for octave-devel it appears that the arpack dependency 
is missing.  It is likely that you built octave prior to installing arpack.

        http://www.macports.org/ports.php?by=name&substr=octave-devel

Can you file a bug report with macports?

        http://trac.macports.org/report/1

I've modified their portfile and renamed the port "octave36".  I've fixed the 
lib-dependencies and the run-dependencies.  To use a local portfile, refer to 
the link below.

        http://guide.macports.org/chunked/development.local-repositories.html

Or you should be able to fix things by working around the bugs in the 
octave-devel portfile by first manually installing the lib and run 
dependencies, uninstalling octave-devel, and then reinstalling octave-devel.

        sudo port install arpack +atlas
        sudo port install epstool
        sudo port install transfig
        sudo port install pstoedit
        sudo port uninstall octave-devel
        sudo port install octave-devel +atlas+fltk

Since this will rebuild Octave from scratch, installing octave-devel should 
take much more time than the rest.

Ben

Portfile
Description: Binary data