Re: Problem with simple graphics

[Ben Abbott]

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*** also respond at the bottom so that the entire exchange can be read from top 
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On Feb 19, 2012, at 10:28 AM, Bernard Abramson wrote:

> On Feb 18, 2012, at 9:36 PM, Ben Abbott wrote:
> 
>> On Feb 18, 2012, at 5:40 PM, Bernard Abramson wrote:
>> 
>>> I have the current version of Octave (3.4.0) running on the current version 
>>> of Mac OS X.  I have installed Gnuplot.  I have corrected the  
>>> DYLD_LIBRARY_PATH problem in  Gnuplot-4.4.3.  However, when I appempt to 
>>> plot in Octave I obtain:
>>> 
>>> octave-3.4.0:1> sombrero(25)
>>> error: popen2: popen2 (child): unable to start process -- Operation not 
>>> permitted
>>> 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: /Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: /bin/sh: bad 
>>> interpreter: Operation not permitted
>>> error: `unset' undefined near line 2 column 1
>>> warning: broken pipe -- some output may be lost
>>> 
>>> Any suggestions?
>>> 
>>> Sincerely,
>>> 
>>> Bernard Abramson
>> 
>> What do you get when you type ...
>> 
>>      system ('which gnuplot')
>> 
>> ... I get ...
>> 
>>      /Applications/Gnuplot.app/Contents/Resources/bin/gnuplot
>> 
>> If so, what happens when you type ? ....
>> 
>>      system gnuplot
>> 
>> By "current verrsion of MacOS X do you refer to 10.7.3?
>> 
>> Ben
>> 
> Ben,
> 
> Thanks for the quick reply.
> 
> system('which gnuplot')
> 
> yields the same answer you quoted.
> 
> system gnuplot
> 
> yields:
> 
> sh: /Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: /bin/sh: bad 
> interpreter: Operation not permitted
> ans =  126
> 
> Yes, I'm using OS X 10.7.3
> 
> Any suggestions will be appreciated.  Whatever is wrong must be minor as 
> there ought to be many many successful installations of Octave on Mac.
> 
> Bernard

It looks like the change you made to the gnuplot script introduced a syntax 
error.

Any chance you edited the file below with Textedit ?

        /Applications/Gnuplot.app/Contents/Resources/bin/gnuplot

If so, you'll need to be sure to save it as plain text. When saving be sure you 
select "Plain Text Encoding [Unicode (UTF-8)] and uncheck the box to make sure 
".txt" isn't used as an extension.

If the gnuplot script was saved correctly, then I suspect you made a mistake in 
modifying it ... or the instructions you followed contained a mistake.

We recently updated the instructions for fixing gnuplot under Lion. See the 
README at the link below.

http://sourceforge.net/projects/octave/files/Octave%20MacOSX%20Binary/2011-04-21%20binary%20of%20Octave%203.4.0/

Ben