problem with gnuplot and octave, 2.9.19, MSVC build on windows XP

[N. B.]

I tried just a tad bit more. Maybe it doesn't make any sense, I don't know, but I tried popen2 instead of popen. Still it doesn't work, but it fails silently and the handle is not -1. On the other hand experimenting with the scripts, I stumbled on yet something else. There is a code in __gnuplot_version__.m:
[status, output] = system (sprintf ("%s --version", gnuplot_binary ()));
This seems to work under linux (Fedora 8, octave 2.9.15), but in windows, it gives an error:

octave:1> [status, output] = system (sprintf ("%s --version", gnuplot_binary ()));
error: value on right hand side of assignment is undefined
error: evaluating assignment expression near line 1, column 19

Since it pointed to a c++ function (system, in this case), I stopped there, as I'm not sure exactly what I need to compile octave in windows (and how painful it will be, though should be OK once you set things up).
Kind regards,

Nusret



----- Original Message ----
From: Michael Goffioul <michael.goffioul at gmail.com>
To: N. B. <octavius1907 at yahoo.com>
Cc: help-octave at octave.org
Sent: Monday, December 17, 2007 7:08:34 AM
Subject: Re: problem with gnuplot and octave, 2.9.19, MSVC build on windows XP

On 12/17/07, N. B. <octavius1907 at yahoo.com> wrote:
>
>
> Then it invokes gnuplot (the one included with octave: I removed my other
> version to save space and confusion), but octave seems to have no control
> until I quit the gnuplot. Namely,  I cannot use octave syntax until I type
> quit in gnuplot prompt and fall back to the octave prompt.

This is normal. I just wanted to check whether gnuplot was available.
Normally, octave starts gnuplot using something like:

h = popen("pgnuplot");
pclose(h);

If this works correctly, then I don't see any other way to find the problem
than debugging drawnow.m to see what's exactly executed and trying to
see what's going on.

Michael.


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