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[Fwd: Re: [Fwd: Re: EigsRealNonSymmetricFunc]]
From: |
Jordi Gutiérrez Hermoso |
Subject: |
[Fwd: Re: [Fwd: Re: EigsRealNonSymmetricFunc]] |
Date: |
Sat, 16 Aug 2014 13:56:06 -0400 |
There you have it, see below.
- Jordi G. H.
-------- Forwarded Message --------
From: David Bateman <address@hidden>
To: Jordi Gutiérrez Hermoso <address@hidden>
Subject: Re: [Fwd: Re: EigsRealNonSymmetricFunc]
Date: Sat, 16 Aug 2014 18:17:31 +0200
> Le 16 août 2014 à 17:28, Jordi Gutiérrez Hermoso <address@hidden> a écrit :
>
> Oops, looks like I neglected to CC you in this exchange below.
>
> - Jordi G. H.
>
> -------- Forwarded Message --------
> From: Jordi Gutiérrez Hermoso <address@hidden>
> To: Tommi Höynälänmaa <address@hidden>
> Cc: octave maintainers mailing list <address@hidden>
> Subject: Re: EigsRealNonSymmetricFunc
> Date: Sat, 16 Aug 2014 09:16:27 -0400
>
> Moving this discussion to the maintainers' list...
>
>> On Fri, 2014-08-15 at 15:58 +0300, Tommi Höynälänmaa wrote:
>> What is the purpose of the postprocessing after call to dneupd in
>> function EigsRealNonSymmetricFunc in liboctave/numeric/eigs-base.cc?
>
> I suppose you mean this part of the code?
>
>
> http://hg.savannah.gnu.org/hgweb/octave/file/c4ffcc961f3c/liboctave/numeric/eigs-base.cc#l2669
>
> I don't know, it looks pretty obscure. Looks like the code has been
> mostly untouched since David Bateman first wrote it. You can verify
> this with
>
> hg annotate --user --number --ignore-all-space
> liboctave/numeric/eigs-base.cc
>
> or, shorter,
>
> hg ann -unw liboctave/numeric/eigs-base.cc
>
> (read `hg help annotate`)
>
> Let's try asking him, then. David, can you comment on what's going on
> in this part of the code?
>
> - Jordi G. H.
>
It was to put the order of the eigenvalues in the same order as Matlab at the
time I wrote the code. Matlab might have changed the order since so no idea if
this is still the right thing to do and I don't have access to Matlab yo check
D.
>
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Jordi Gutiérrez Hermoso <=