Re: using octave from a C++ program

[taltman]

It is possible to get just about the same effect of compiling an
Octave m-file and accessing it from the command line.

My initial approach would be to do the following:

* code up your program in Octave m-files. Debug it and make it
  error-tolerant.

* compile it into a oct-file using 'mkoctfile', following the examples
  that Paul was describing.

* write a really tiny one-line Octave script, with the following as
  the first line:

#!/usr/bin/octave -qf

Assuming that '/usr/bin/octave' is the path to Octave on your system,
this will launch the octave interpreter automagically as a script (
just like with Perl or shell scripts ). '-q' turns off the initial
text intro to the Octave interpreter, taking you straight to the
prompt. '-f' bypasses any ".octaverc" file that you might have in your
home directory. Also, make sure to tweak the permissions of this small
wrapper-script so that it is executable. This means that the only
thing that the Octave interpreter would have to do is to initialize,
and then call your one-line program, all of which you compiled into a
C++ extension of Octave.

Any other tips out there?

~Tomer Altman


On Oct 23, 2003 at 9:57pm, address@hidden wrote:

pkienz >Date: Thu, 23 Oct 2003 21:57:12 +0100
pkienz >From: address@hidden
pkienz >To: Jonathan Hudson <address@hidden>,
pkienz >     address@hidden
pkienz >Subject: Re: using octave from a C++ program
pkienz >Resent-Date: Thu, 23 Oct 2003 20:53:52 -0500
pkienz >Resent-From: address@hidden
pkienz >
pkienz >On 22 Oct 2003 at 10:33, Jonathan Hudson wrote:
pkienz >
pkienz >> I'm trying to use some of octave's functions within a C++ program,
pkienz >> but I'm getting lots of undefined references and 
pkienz >> I'm not sure what I'm doing wrong.
pkienz >
pkienz >You are failing to initialize the interpreter.  Right now, you have
pkienz >to borrow a lot of code from octave's main procedure to do this.
pkienz >Eventually we will sort it so that you can call init and eval and
pkienz >it will do the right thing.  We haven't yet because in almost all
pkienz >instances, it makes more sense to extend octave with C code
pkienz >than extend C code with octave.  
pkienz >
pkienz >The code in src/DLD-FUNCTIONS gives several examples of 
pkienz >how to extend octave.  There is also a simple example in
pkienz >another directory. The best overview document is da coda al 
pkienz >fine at http://octave.sf.net/coda, but it is somewhat out of 
pkienz >date by now.  I also remember putting stuff on 
pkienz >wiki.octave.org, but I can't find it there now.
pkienz >
pkienz >Hope that helps,
pkienz >
pkienz >Paul Kienzle
pkienz >address@hidden
pkienz >
pkienz >
pkienz >
pkienz >-------------------------------------------------------------
pkienz >Octave is freely available under the terms of the GNU GPL.
pkienz >
pkienz >Octave's home on the web:  http://www.octave.org
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pkienz >Subscription information:  http://www.octave.org/archive.html
pkienz >-------------------------------------------------------------
pkienz >
pkienz >



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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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