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Re: ~/.octaverc overwrites OCTAVE_PATH!!

From: Ben Abbott
Subject: Re: ~/.octaverc overwrites OCTAVE_PATH!!
Date: Mon, 22 Dec 2008 14:09:09 -0500

On Dec 22, 2008, at 1:37 PM, Rosen Diankov wrote:

2008/12/21 Ben Abbott <address@hidden>:

On Dec 21, 2008, at 3:38 PM, Rosen Diankov wrote:

Hi all,

I'm trying to append my own directory with octave files
(/usr/local/myoctavefiles) to the automatically set octave paths. At
first, I tried doing

export OCTAVE_PATH=/usr/local/myoctavefiles

but it didn't work since the auto-generated ~/.octaverc file (from
savepath) overwrites any added paths via the path function. Ie, the
~/.octaverc file looks like:

## Begin savepath auto-created section, do not edit
path ('/usr/local/share/...',...)
## End savepath auto-created section

So the next obvious thing to do was to call
addpath('/usr/local/myoctavefiles') right after the '## End savepath
...', but this has a very dangerous side-effect. The problem is that
the next time the user calls 'savepath', it will put
/usr/local/myoctavefiles inside the auto-generated code. And even if I
remove my addpath or set OCTAVE_PATH to something different, my path
will remain added to the octave path!

So I propose a small savepath change that always puts
getenv('OCTAVE_PATH') inside the auto-generated code.
It would be great if this makes it into octave 3.0.4

thank you,
rosen diankov

If I understand you correctly you'd like to be able to dynamically add a
specific path when octave is run. Have you looked at the command line
options. For example,

      octave --path "/usr/local/myoctavefiles"

Other command line options are detailed at the link below.


It doesn't work, the ~/.octaverc file overwrites any paths from
OCTAVE_PATH, -p, or --path because savepath directly calls path. it
would be great if at least it called addpath.


Do you mean you'd like to have the lines added to .octaverc by savepath use "addpath(...)" rather than "path(...)"?

sigh ... I find the savepath command more trouble that it is worth :-(

You may find the best solution it to modify .octaverc by manually and use addpath() to include your local octave directories.

In any event, we will want to be compatible with matlab. Does matlab provide the functionality you're looking for?


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