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choice of external program

From: John W. Eaton
Subject: choice of external program
Date: Thu, 8 Nov 2001 22:49:15 -0600

On  1-Nov-2001, Avraham Rosenberg <address@hidden> wrote:

| Hi,
| I happened to install octave on a system that lacked
| xloadimage. Later on, when I had to display an image, instead of
| balking, octave used xv which was present in the system. It was, of
| course slower, but very handy, in that particular case, as I needed
| to know the coordinates of various features on the images. 
| Question: where resides the information about the external program
| to be used ? Can one choose it everytime one uses octave or one hase
| to have customized copies of the executable one to use with
| xloadimage and the other with xv ? 
| Similar question about gnuplot: pgplot can be sometimes handier. 
| I am using linux: Slackware 7.0 at home and RedHat 6.1 at work. For
| the moment both systems display images  with xv. The RedHat system
| worked initially with xloadimage, but as I needed the features of
| xv, I renamed xloadimage so that ./configure won't find it,
| installed xv and then reinstalled octave. Quite a job. I would
| certainly prefer an easier way, if possible. Thankfully  yours,

The choice of what image viewer to use is not determined by
configure.  It is coded into the image function defined in image.m.
Edit that file to do whatever you prefer, or better, fix it so that it
is easy for people to choose different image viewers at run time and
then contribute the changes back to the Octave project.



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