Re: Empty plot

[John B. Thoo]

On Dec 17, 2010, at 8:26 AM, bpabbott wrote:

> On Dec 17, 2010, at 09:24 AM, "John B. Thoo" <address@hidden> wrote:
> 
>> On Dec 17, 2010, at 5:19 AM, Ben Abbott wrote:
>> 
>> > On Dec 16, 2010, at 10:39 PM, John B. Thoo wrote:
>> > 
>> >> Hi. I'm sorry if this is a FAQ, but I haven't been able to find an answer.
>> >> 
>> >> I'm using Octave 3.2.3 on Mac OS X 10.6.4 in X11. When I try to plot, I 
>> >> get an empty plot window and this:
>> >> 
>> >> octave-3.2.3:1> getenv ("GNUTERM")
>> >> ans = x11
>> >> octave-3.2.3:2> x = 0:0.1:pi;
>> >> octave-3.2.3:3> plot (x, sin(x))
>> >> octave-3.2.3:4> 
>> >> gnuplot> set palette file "-" binary record=64 using 1:2:3:4;
>> >> ^
>> >> line 0: Gray scale not sorted in gradient.
>> >> 
>> >> 
>> >> octave-3.2.3:4>
>> >> 
>> >> When I start gnuplot on its own, I see that I have Version 4.2 patchlevel 
>> >> 5.
>> >> 
>> >> Any help would be appreciated. Thanks.
>> >> 
>> >> ---John.
>> >> 
>> >> -----------------------------------------------------------------------
>> >> "There are no atheists in foxholes."
>> >> ---Fr. William T. Cummings, M.M. (WWII, Philippines)
>> >> [_The Grunt Padre_, CMJ Marian Pub., p. 56]
>> > 
>> > http://atheism.about.com/od/atheismmyths/a/AtheistsFoxhole.htm
>> > 
>> > John, please tell us where you got your Octave. Was it from MacPorts, 
>> > Fink, Sourceforge, or somewhere else?
>> > 
>> > Also it is possible to have more than one version of gnuplot. Please check 
>> > which one Octave is using by typing ...
>> > 
>> > __gnuplot_version__
>> > 
>> > Since you're set up to use X11, please make sure the X11.app is running 
>> > before you try to plot. I've had some troubles in X11 on MacOS X, and 
>> > often have to quit X11 and start it again.
>> > 
>> > Ben
>> 
>> Hello, Ben. Thanks for your reply.
>> 
>> I'm using Thomas Treichi's binary of Octave from sourceforge. The thing is 
>> that I could plot in X11 using Thomas's previous version on my former 
>> PowerBook 12". It was only after upgrading to Octave 3.2.3 i386 because I 
>> had gotten a MacBook Pro that plotting broke.
>> 
>> I had asked about this previously
>> 
>> <http://octave.1599824.n4.nabble.com/set-palette-file-quot-quot-binary-record-64-using-1-2-3-4-td2292036.html>
>> 
>> but didn't get any reply then. Unfortunately, I haven't been able to figure 
>> out the problem since, either.
>> 
>> By the way, this is what Octave returns for gnuplot version:
>> 
>> octave-3.2.3:1> __gnuplot_version__
>> ans = 4.2.5
>> octave-3.2.3:2>
>> 
>> Thanks again for your reply.
>> 
>> ---John.
>  
> I haven't encountered the specific problem you are seeing. However, since you 
> are using SnowLeopard, you'll want to read the link below, before upgrading 
> to 10.6.5.
> 
> http://sourceforge.net/projects/octave/files//Octave%20MacOSX%20Binary/2009-10-03%20binary%20of%20Octave%203.2.3/README_OSX1065.txt/view
> 
> If you stick to 10.6.4, you might try installing a newer version of gnuplot. 
> Be sure to place it where the one from Thomas' bundled is ... or use the 
> "gnuplot_binary" function to point to the new one.
> 
> Ben

Thanks for the link, Ben.  That will come in handy.

On a lark, I typed in an xterm window "which gnuplot" and got this:

[502] bash-3.2$ which gnuplot
/usr/bin/gnuplot
[503] bash-3.2$ /usr/bin/gnuplot  

        G N U P L O T
        Version 4.2 patchlevel 5 
        last modified Mar 2009
        System: Darwin 10.4.0

        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'
gnuplot> quit
[504] bash-3.2$

I had compiled this from source when I also compiled Octave from source (before 
I began to use Thomas's binary).

So, perhaps I'm not using the Gnuplot.app binary that is in the Applications 
folder with Octave.app.  Could this be a problem?  If it could, what would be a 
way to fix this?  (What is the "gnuplot_binary" function?)

Thanks again.

---John.

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