Re: cannot plot via gnuplot (4.2.6) from octave 3.2.3 (on Mac OS 10.6)

[Thomas Treichl]

Ben Abbott schrieb:
> On Oct 13, 2009, at 12:19 PM, Bob Q wrote:
>
> > Hello,
> >
> > I downloaded and installed the octave-3.2.3 dmg on Mac OS X (10.6,  
> > intel) along with the gnuplot-4.2.6 dmg in the Extras.
> >
> > At first, it could not find gnuplot...
> >
> > > plot(x,y)
> > [quote]
> > error: popen2 (child): unable to start process -- No such file or  
> > directory
> > error: called from:
> > error:   /Applications/Octave 3.2.3.app/Contents/Resources/share/ 
> > octave/3.2.3/m/plot/__gnuplot_open_stream__.m at line 28, column 44
> > error:   /Applications/Octave 3.2.3.app/Contents/Resources/share/ 
> > octave/3.2.3/m/plot/gnuplot_drawnow.m at line 85, column 19
> > sh: gnuplot: command not found
> > error: you must have gnuplot installed to display graphics; if you  
> > have gnuplot installed in a non-standard location, see the  
> > 'gnuplot_binary' function
> > octave-3.2.3:4> gnuplot_binary("/Applications/Gnuplot")
> > octave-3.2.3:5> plot(x,y)
> > sh: /Applications/Gnuplot: No such file or directory
> > error: you must have gnuplot installed to display graphics; if you  
> > have gnuplot installed in a non-standard location, see the  
> > 'gnuplot_binary' function
> > [/quote]
> >
> > ...solving this with a...
> >
> > > gnuplot_binary("/Applications/Gnuplot.app/Contents/Resources/bin/ 
> > gnuplot")
> >
> > ...and again plotting gives...
> > [quote]
> > error: `unset' undefined near line 4 column 1
> > warning: broken pipe -- some output may be lost
> > [/quote]
> >
> > where it can only be escaped with a ctrl-c.
> >
> > Is gnuplot 4.2.6 not working with octave 3.2.3?  Is there a way  
> > around this?
> >
> > Your help or advise is greatly appreciated.
> >
> > Thanks, Bob
>
> Bob,
>
> I've had no trouble with gnuplot 4.2.3 or later versions. I'm  
> currently running gnuplot's developer's sources.
>
> Please try running gnuplot directly and type "set term". You'll see a  
> list of available terminals. For example, I get the list below ....
>
> gnuplot> set term
>
> Available terminal types:
>               aqua  Interface to graphics terminal server for Mac OS X
>             canvas  HTML Canvas object
>                cgm  Computer Graphics Metafile
>              corel  EPS format for CorelDRAW
>             dpu414  Seiko DPU-414 thermal printer [small medium large]
>               dumb  ascii art for anything that prints text
>                dxf  dxf-file for AutoCad (default size 120x80)
>              eepic  EEPIC -- extended LaTeX picture environment
>                emf  Enhanced Metafile format
>              emtex  LaTeX picture environment with emTeX specials
>           epslatex  LaTeX picture environment using graphicx package
>       epson_180dpi  Epson LQ-style 180-dot per inch (24 pin) printers
>        epson_60dpi  Epson-style 60-dot per inch printers
>        epson_lx800  Epson LX-800, Star NL-10, NX-1000, PROPRINTER ...
>                fig  FIG graphics language for XFIG graphics editor
>                gif  GIF images using libgd and TrueType fonts
>           gnugraph  GNU plot(1) format ["fontname" font_size]
>               gpic  GPIC -- Produce graphs in groff using the gpic  
> preprocessor
>            hp2623A  HP2623A and maybe others
>             hp2648  HP2648 and HP2647
>             hp500c  HP DeskJet 500c, [75 100 150 300] [rle tiff]
> Press return for more:
>               hpdj  HP DeskJet 500, [75 100 150 300]
>               hpgl  HP7475 and relatives [number of pens] [eject]
>             hpljii  HP Laserjet series II, [75 100 150 300]
>               hppj  HP PaintJet and HP3630 [FNT5X9 FNT9X17 FNT13X25]
>             imagen  Imagen laser printer
>               jpeg  JPEG images using libgd and TrueType fonts
>              latex  LaTeX picture environment
>                lua  Lua generic terminal driver
>                 mf  Metafont plotting standard
>                mif  Frame maker MIF 3.00 format
>                 mp  MetaPost plotting standard
>            nec_cp6  NEC printer CP6, Epson LQ-800 [monocrome color  
> draft]
>            okidata  OKIDATA 320/321 Standard
>                pbm  Portable bitmap [small medium large] [monochrome  
> gray color]
>               pcl5  HP Designjet 750C, HP Laserjet III/IV, etc. (many  
> options)
>                pdf  PDF (Portable Document File) file driver
>           pdfcairo  pdf terminal based on cairo
>                png  PNG images using libgd and TrueType fonts
>           pngcairo  png terminal based on cairo
>         postscript  PostScript graphics, including EPSF embedded files  
> (*.eps)
>            pslatex  LaTeX picture environment with PostScript \specials
>              pstex  plain TeX with PostScript \specials
> Press return for more:
>           pstricks  LaTeX picture environment with PSTricks macros
>                qms  QMS/QUIC Laser printer (also Talaris 1200 and  
> others)
>              regis  REGIS graphics language
>               rgip  RGIP metafile (Uniplex). Option: fontsize (1-8)
>              starc  Star Color Printer
>                svg  W3C Scalable Vector Graphics driver
>        tandy_60dpi  Tandy DMP-130 series 60-dot per inch graphics
>            tek40xx  Tektronix 4010 and others; most TEK emulators
>            tek410x  Tektronix 4106, 4107, 4109 and 420X terminals
>            texdraw  LaTeX texdraw environment
>               tgif  TGIF X11 [mode] [x,y] [dashed] ["font" [fontsize]]
>               tikz  TeX TikZ graphics macros via the lua script driver
>           tkcanvas  Tk/Tcl canvas widget [perltk] [interactive]
>               tpic  TPIC -- LaTeX picture environment with tpic  
> \specials
>            uniplex  RGIP metafile (Uniplex). Option: fontsize (1-8)  
> (Same as rgip)
>            unknown  Unknown terminal type - not a plotting device
>              vttek  VT-like tek40xx terminal emulator
>                x11  X11 Window System
>               xlib  X11 Window System (gnulib_x11 dump)
>              xterm  Xterm Tektronix 4014 Mode
>
> Please verify your gnuplot supports "aqua" and "x11".
>
> If "aqua" is not present, then you can use the "x11" terminal by  
> adding the following to your ~/.octaverc file
>
>         setenv ("GNUTERM", "x11")
>
> If both aqua and x11 are listed, be sure to type "close all" before  
> you use "gnuplot_binary" to set the path to your gnuplot. If you set  
> gnuplot_binary in your ~/.octaverc, be sure to quit and restart octave  
> before attempting a plot.
>
> Ben

Hi Bob, hi Ben,

I expect it has nothing to do with the terminal here. I do more expect it has to 
do with the "gnuplot_binary" or an environment variable. Bob, if you have 
installed Octave.app and Gnuplot.app both in the same directory then you 
normally need to set nothing, ie. don't need to set gnuplot_binary because it 
already is set to 'gnuplot' - Octave.app then automatically finds Gnuplot.app.

Please start up Octave and do nothing else but just calling

  gnuplot_binary

Next please call the command in Octave.app

  system ('which gnuplot')

Can you reply the output please.

  Thomas