From help-request at octave dot org Wed Jul 20 08:40:06 2005
Subject: Re: using strings as arguments to load and save
From: =?ISO-8859-1?Q?S=F8ren_Hauberg?= <soren at hauberg dot org>
To: Nuno Nunes <n dot nunes at uea dot ac dot uk>
CC: help at octave dot org
Date: Wed, 20 Jul 2005 15:39:13 +0200

Hi
While I haven't tried this, I guess you could do somewhing like this
load("-hdf5", file, "DAY")

/Søren

Nuno Nunes wrote:
> Hi,
> 
> I'm trying to use the load and save commands with a string variable as
> the name of the file to work on. I'm very puzzled as to why it works in
> one case, but not in others (that would be more useful to me).
> 
> If I write the filename explicitly, the command works as expected, i.e.
> loads the variable DAY from HDF5 file nov03.h5m2:
> octave:14> load -hdf5 nov03.h5m2 DAY
> 
> Using a string variable as filename, I get an error:
> octave:17> file = "nov03.h5m2"
> octave:18> load file
> error: load: nonexistent file: `file'
> 
> After some experimentation I found that
> 
>>load (file)
> 
> works (i.e. the variable file expands to nov03.h5m2), except it loads
> all variables (which I want to avoid with 7 GB files...) If I specify
> the variable, I get a syntax error:
> octave:18> load (file) DAY
> parse error:
> 
>   syntax error
> 
> 
>>>>load (file) DAY
> 
>                   ^
> octave:18> load -hdf5 (file) DAY
> error: load: nonexistent file: `(file)'
> 
> I couldn't find any documentation of this behaviour, and now I ran out
> of ideas to try to get the variable string to expand to its value. Has
> anyone managed to do this? How is it done? Am I doing anything wrong?
> Any help will be greatly appreciated.
> 
> Thanks,
> Nuno
> 
> 
> 
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Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
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