Re: Problem with simple graphics

[Ben Abbott]

On Sep 19, 2011, at 10:07 PM, Lloyd Goldwasser wrote:

> I'm just getting started with Octave, with the current goal of running some 
> existing code.  The graphics, even a simple plot command, doesn't seem to 
> work.  A simple example is below.  I'm running Octave 3.4.0 on a Macbook Pro 
> with Mac OS X 10.6.6, using the standard downloaded executable.
> 
> Any suggestions would be appreciated!
> 
> Thanks in advance,
> 
> Lloyd
> 
> 
> ------------------------------------
> 
> Last login: Mon Sep 19 18:36:43 on ttys000
> exec '/Applications/Octave.app/Contents/Resources/bin/octave'
> lloyd-goldwassers-macbook-pro-2:~ lloyd$ exec 
> '/Applications/Octave.app/Contents/Resources/bin/octave'
> GNU Octave, version 3.4.0
> Copyright (C) 2011 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-apple-darwin10.7.3".
> 
> 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
> 
> Read http://www.octave.org/bugs.html to learn how to submit bug reports.
> 
> For information about changes from previous versions, type `news'.
> 
> octave-3.4.0:1> clear
> octave-3.4.0:2> a = 1:6
> a =
> 
>   1   2   3   4   5   6
> 
> octave-3.4.0:3> plot (a)
> error: popen2: popen2 (child): unable to start process -- No such file or 
> directory
> error: called from:
> error:   
> /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/plot/__gnuplot_open_stream__.m
>  at line 30, column 44
> error:   
> /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/plot/__gnuplot_drawnow__.m
>  at line 72, column 19
> sh: gnuplot: command not found
> error: `unset' undefined near line 4 column 1
> warning: broken pipe -- some output may be lost

You'll need to install gnuplot.

It should be included in the dmg you downloaded.

I think it is in the folder called "Extras".

Ben