-dpng gives "invalid command"

[John B. Thoo]

On Jul 10, 2009, at 11:29 AM, Thomas Treichl wrote:

> John B. Thoo schrieb:
>> Hi, Thomas.
>> gnuplot> show version long
>>         G N U P L O T
>>         Version 4.2 patchlevel 5
>>         last modified Mar 2009
>>         System: Darwin 8.11.0
>>         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>
>> Compile options:
>> +READLINE  -LIBREADLINE  +HISTORY  +BACKWARDS_COMPATIBILITY   
>> +BINARY_DATA
>> -LIBGD
>> -NOCWDRC  +X11  +X11_POLYGON  +MULTIBYTE  +USE_MOUSE   
>> +HIDDEN3D_QUADTREE
>> +DATASTRINGS  +HISTOGRAMS  +OBJECTS  +STRINGVARS  +MACROS  +IMAGE
>> DRIVER_DIR     = "/usr/local/libexec/gnuplot/4.2"
>> GNUPLOT_PS_DIR = "/usr/local/share/gnuplot/4.2/PostScript"
>> HELPFILE       = "/usr/local/share/gnuplot/4.2/gnuplot.gih"
>> gnuplot>
>> Thanks.
>> ---John.
>
> Then yes, you're right - you're missing support for *png. Your  
> version of Gnuplot has not been compiled against libgd. libgd (and  
> libpng and libjpg...) is the library that you need to create  
> graphics in *png, *jpg and *gif.
>
> As your binary is in /usr/local I would expect you either compile  
> and install Gnuplot for yourself or you use MacPorts? Either or,  
> you need a binary that should give you something like this to save  
> in *png on your Mac (compare compile options GD_* from my machine  
> with yours):
>
>   gnuplot> show version long
>
>         G N U P L O T
>         Version 4.2 patchlevel 5
>         last modified Mar 2009
>         System: Darwin 8.11.1
>
>         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>
>
>   Compile options:
>   -READLINE  +LIBREADLINE  +HISTORY  +BACKWARDS_COMPATIBILITY   
> +BINARY_DATA
>   +GD_PNG  +GD_JPEG  +GD_GIF  +ANIMATION
>   -NOCWDRC  +X11  +X11_POLYGON  +MULTIBYTE  +USE_MOUSE   
> +HIDDEN3D_QUADTREE
>   +DATASTRINGS  +HISTOGRAMS  +OBJECTS  +STRINGVARS  +MACROS  +IMAGE
>
>   DRIVER_DIR     =
> "/Users/Thomas/bin/Octave.app.3.2.0/Gnuplot.app/Contents/Resources/ 
> libexec/gnuplot/4.2"
>   GNUPLOT_PS_DIR = "/tmp/gnuplot-i386/share/gnuplot/4.2/PostScript"
>   HELPFILE       = "/Users/Thomas/bin/Octave.app.3.2.0/Gnuplot.app/ 
> Contents/Resources/share/gnuplot/4.2/gnuplot.gih"
>
> Hope this helps somehow,
>
>   Thomas

Hi, Thomas.

Yes, I compiled gnuplot myself.  (I guess that was a mistake.)  Would  
the easiest thing for me to do now be to install gnuplot from your  
octave-3.2.0-ppc.dmg?

If I drag-and-drop gnuplot from the .dmg into my Applications folder,  
would I then have to do anything in particular to use it instead of  
my previous installation?

Thanks again.

---John.