-----Original Message-----
From: Ben Abbott [mailto:address@hidden
Sent: Friday, June 19, 2009 5:42 PM
To: Jason Ding
Cc: address@hidden
Subject: Re: help on plot in octave
On Jun 19, 2009, at 8:11 PM, Jason Ding wrote:
On Jun 19, 2009, at 6:31 PM, Jason Ding wrote:
Hi, All,
I installed both gnuplot and Octave. Gnuplot and octave work well
separately. When I tried to use the "plot" function in octave, I
got the following errors after seeing an empty figure window popping
up. Can anyone have the similar experience? Or what may cause this?
Thanks, a lot.
if (exists("GPVAL_TERM")) print GPVAL_TERM; else print NaN
^
line 0: invalid expression
error: Invalid call to strcat. Correct usage is:
-- Function File: strcat (S1, S2, ...)
Please include the OS your are using as well as the version of Octave
and gnuplot.
The first error, complaining of GPVAL_TERM, appears to be from
gnuplot. The "strcat" error is from Octave (but is only occurring
because of the 1st error).
Assuming your Octave version is > 3.0 and your gnuplot is 4.2.2 or
more recent, it is likely that you don't have a default terminal type
set for gnuplot.
You'll want to set the GNUTERM environment variable. For Linux it
should be set to "x11" or "wxt". For Mac OSX it can be set to "x11"
or
"aqua". For Windows (I think) it can be set to "windows" and if you
have x11 installed, then "x11" should also work (I'm guessing as I
haven't used windows in years).
Ben
Ben,
Thanks for your reply. Here is more info about OS, GNUplot and
octave.
Terminal type is set to x11, gnuplot is 4.0 and octave is 3.2.0.
Thanks,
Jason
OS:
Linux version 2.6.18-92.el5 (address@hidden) (gcc
version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP Tue Jun 10 18:51:06
EDT 2008
GNUPLOT:
Version 4.0 patchlevel 0
last modified Thu Apr 15 14:44:22 CEST 2004
System: Linux 2.6.18-92.el5
Copyright (C) 1986 - 1993, 1998, 2004
Thomas Williams, Colin Kelley and many others
This is gnuplot version 4.0. Please refer to the documentation
for command syntax changes. The old syntax will be accepted
throughout the 4.0 series, but all save files use the new
syntax.
Type `help` to access the on-line reference manual.
The gnuplot FAQ is available from
http://www.gnuplot.info/faq/
Send comments and requests for help to
<address@hidden>
Send bugs, suggestions and mods to
<address@hidden>
Terminal type set to 'x11'
Octave:
GNU Octave, version 3.2.0
Copyright (C) 2009 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. For details, type `warranty'.
Octave was configured for "x86_64-unknown-linux-gnu".
Additional information about Octave is available at
http://www.octave.org.
Please contribute if you find this software useful.
For more information, visit http://www.octave.org/help-wanted.html
Report bugs to <address@hidden> (but first, please read
http://www.octave.org/bugs.html to learn how to write a helpful
report).
For information about changes from previous versions, type `news'.
octave:1>
It appears that the problem may be that you are running a rather old
version of gnuplot.
Can you upgrade to a version more recent than 4.2.2 (the latest
release if 4.2.5).
Ben
Ben,
Thanks for the suggestion. I installed gnuplot4.2.5 and tested it ok.
Then I changed the gnuplot_binary to this new gnuplot4.2.5 binary. Run
octave3.0, I got the same errors as before but I did get a warning
saying gnuplot_binary is not a built-in variable.
Thanks,
Jason
The following screen captures for running new gnuplot and octave:
address@hidden bin]$ ./gnuplot
G N U P L O T
Version 4.2 patchlevel 5
last modified Mar 2009
System: Linux 2.6.18-92.el5
Copyright (C) 1986 - 1993, 1998, 2004, 2007 - 2009
Thomas Williams, Colin Kelley and many others
Type `help` to access the on-line reference manual.
The gnuplot FAQ is available from http://www.gnuplot.info/faq/
Send bug reports and suggestions to
<http://sourceforge.net/projects/gnuplot>
Terminal type set to 'x11'
address@hidden ~]$ octave
GNU Octave, version 3.2.0
Copyright (C) 2009 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. For details, type `warranty'.
Octave was configured for "x86_64-unknown-linux-gnu".
Additional information about Octave is available at
http://www.octave.org.
Please contribute if you find this software useful.
For more information, visit http://www.octave.org/help-wanted.html
Report bugs to <address@hidden> (but first, please read
http://www.octave.org/bugs.html to learn how to write a helpful
report).
For information about changes from previous versions, type `news'.
warning: gnuplot_binary is no longer a built-in variable; please read
the NEWS file or type `news' for details
gnuplot_binary = /home/jding/usr/bin/gnuplot
octave:1>