From bug-octave-request at bevo dot che dot wisc dot edu  Thu Jun  7 15:28:43 2001
Subject: problem with exist(fn)==2 and load(fn); 
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: a dot schloegl at ieee dot org
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Thu, 7 Jun 2001 15:28:33 -0500

On 10-May-2001, Alois =?iso-8859-1?Q?Schl=F6gl?= <schloegl at dpmi dot tu-graz dot ac dot at> wrote:

| t.mat is a file within LOADPATH but not within the current directory.
| I get the following result
| 
| fn='t.mat';
| octave:63> exist(fn)
| ans = 2
| octave:64> load t.mat
| error: load: couldn't open input file `t.mat'
| error: evaluating index expression near line 64, column 1
| 
| Therefore EXIST cannot be used to check the existance of the file fn;
| and the following statement does not work.
|  if exist(fn)==2, load(fn); end;
| 
| IMO, if exist(fn) finds the file, also load should be able to find it.
| 
| Sorry, I've no fix for this problem.

The fix would be to make Octave's load command (optionally) look in
the LOADPATH for files to load.  Would someone like to implement that
and contribute a patch?

To get the behavior you want, use something like

  load (file_in_loadpath ("t.mat"));

Thanks,

jwe



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