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Re: Using expm in C++


From: Alexander Hansen
Subject: Re: Using expm in C++
Date: Mon, 06 Feb 2012 19:33:07 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:9.0) Gecko/20111222 Thunderbird/9.0.1

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On 2/6/12 6:06 PM, loisp wrote:
> http://pdb.finkproject.org/pdb/browse.php?summary=octave This is
> the link to the octave package database in Fink.
> 
> I have octave360, octave360-dev, octave360-shlibs,
> linear-algebra-oct360, gsl-oct360 installed.
> 
> --

The general Octave populace my not know what these mean. :-)

The important part is that "octave360-dev" contains all of the
headers, and I made no modifications to them.

There's an "expm" function, but it's implemented as an m-file rather
than in the C++ API, as far as I can tell--definitely not in Matrix.h:

$ dpkg -L octave360-atlas-dev | xargs grep expm
/sw/include/octave-3.6.0/octave/config.h:/* Define to 1 if you have
the `expm1' function. */
/sw/include/octave-3.6.0/octave/config.h:/* Define to 1 if you have
the `expm1f' function. */
/sw/include/octave-3.6.0/octave/lo-specfun.h:extern OCTAVE_API double
expm1 (double x);
/sw/include/octave-3.6.0/octave/lo-specfun.h:extern OCTAVE_API Complex
expm1 (const Complex& x);
/sw/include/octave-3.6.0/octave/lo-specfun.h:extern OCTAVE_API float
expm1f (float x);
/sw/include/octave-3.6.0/octave/lo-specfun.h:extern OCTAVE_API
FloatComplex expm1 (const FloatComplex& x);
/sw/include/octave-3.6.0/octave/ov-base.h:      umap_expm1,
/sw/include/octave-3.6.0/octave/ov.h:  MAPPER_FORWARD (expm1)
/sw/share/doc/octave360-atlas-dev/ChangeLog:
/linear-algebra/duplication_matrix.m scripts/linear-algebra/expm.m
/sw/share/doc/octave360-atlas-dev/NEWS:      expm1
nargoutchk                  strchr
- -- 
Alexander Hansen, Ph.D.
Fink User Liaison
http://finkakh.wordpress.com/
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