From help-octave-request at bevo dot che dot wisc dot edu Sat Jan 31 01:44:41 2004
Subject: Re: Misc problems with octave-2.1.53 / gnuplot interaction
From: "Dmitri A. Sergatskov" <dmitri at unm dot edu>
To: octave-help-list <help-octave at bevo dot che dot wisc dot edu>
Date: Sat, 31 Jan 2004 00:43:52 -0700

As a followup. I did reinstall 2.1.50.
Now "tee" problem has gone and I can record gnuplot commands.

The plotting bug is different, though is similar!
If I _type_ at the prompt:
[dima at localhost octave]$ octave
GNU Octave, version 2.1.50 (i686-pc-linux-gnu).
...
octave:1> x=linspace(-100,100,400); y=sin(0.1*x); z=cos(0.1*x);
octave:2> plot(x,y)
octave:3> plot(x,z)
octave:4> quit

Everything works as expected. Now I put the same commands into .m file
and execute it. It is important to _restart_ octave before that:

[dima at localhost octave]$ cat testgp1.m
x=linspace(-100,100,400); y=sin(0.1*x); z=cos(0.1*x);
plot(x,y)
plot(x,z)

[dima at localhost octave]$ octave
GNU Octave, version 2.1.50 (i686-pc-linux-gnu).

gnuplot_binary = tee /tmp/gnuplot-oct.cmd |gnuplot
octave:1> testgp1
octave:2>
gnuplot> et nologscale
          ^
          line 0: invalid command


(It did plot everything as expected, though it is not quite
reproducible -- sometimes it plots only the first plot. The gnuplot-oct.cmd
file would have perfectly fine gnuplot commands -- executing it
inside gnuplot produces expected output.)
Another funny thing that all consecutive plots from that moment on will be fine.
Also if I do any kind of plots before running testgp1.m it will work fine as well.
Putting "pause(0.1)" between the plots in testgp1.m eliminate this problem
as well.

Sincerely,
Dmitri.



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