From bug-octave-request at bevo dot che dot wisc dot edu  Wed Dec 22 11:04:09 1999
Subject: Unidentified subject!
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Cyril Humbert <humbert at phobos dot univ-mlv dot fr>
Cc: bug-octave at bevo dot che dot wisc dot edu, humbertc@univ-mlv.fr
Date: Wed, 22 Dec 1999 11:03:50 -0600 (CST)

On 22-Dec-1999, Cyril Humbert <humbert at phobos dot univ-mlv dot fr> wrote:

| To: bug-octave at bevo dot che dot wisc dot edu
| Cc: humbertc at univ-mlv dot fr
| Subject: plot(x1,y1, x2,y2) sometimes plots only the 1st curve
| 
| Bug report for Octave 2.0.14 configured for i386-redhat-linux-gnu
| 
| Description:
| -----------
| 
| It's just strange but not really annoying...
| plot(x1,y1, x2,y2) sometimes plots only the 1st of the two curves.
| 
| Repeat-By:
| ---------
| 
| GNU Octave, version 2.0.14 (i386-redhat-linux-gnu).
| Copyright (C) 1996, 1997, 1998, 1999 John W. Eaton.
| This is free software with ABSOLUTELY NO WARRANTY.
| For details, type `warranty'.
| 
| octave:1> theta = 72 * pi / 180;
| octave:2> x1 = cos (theta/2 + theta*[0:5]);
| octave:3> y1 = sin (theta/2 + theta*[0:5]);
| octave:4> x2 = cos (theta*[0:5]);
| octave:5> y2 = sin (theta*[0:5]);
| octave:6> plot (x1, y1, "-r", x2, y2, "-b")
| 
| At the _1st_ call of plot, only the _1st_ curve (x1, y1) is drawn.
| Generally it's ok after a `replot'.
| 
| 
| cat $HOME/.octaverc
| -------------------
| [../..]
| do_fortran_indexing = 1;
| automatic_replot = 0;
| gnuplot_has_frames = 1;
| gnuplot_has_multiplot = 1;
| 
| gnuplot          
| -------
|         G N U P L O T
|         Linux version 3.7
|         patchlevel 0.2
|         last modified Wed Aug 18 14:06:10 CEST 1999

I think this is a bug in gnuplot.  You can either try to use the patch
that I created for this problem (look on the News page on the Octave
web site for a link) or upgrade to gnuplot 3.7.1, which I think also
includes a fix (finally!).

jwe



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