Re: Does gnuplot still read commands from stdin?

[sfeam <sf...@us...>]

On Sunday, 08 February 2015 10:07:42 PM Philipp K. Janert wrote:
> 
> No, it doesn't work for me.
> 
> Here is the contents of my test script:
> 
> set t pngcairo
> plot sin(x)
> 
> I invoke it like this:
> 
> cat script.gp | gnuplot > graph.png

Works fine here using the v5 release and also current CVS.

	Ethan



> 
> When I use gnuplot 4.6 patchlevel 3 (which comes
> with my distro), all is well. But when I use version
> 5, nothing happens - I simply get dropped into an
> interactive session.
> 
> Mind you, batch processing works with version 5:
> 
> gnuplot5 script.gp > graph.png
> 
> is fine.
> 
> 
> Here are the specifics:
> 
> Linux puget 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC
> 2013 x86_64 x86_64 x86_64 GNU/Linux
> 
> 
>         G N U P L O T
>         Version 5.0 patchlevel 0    last modified 2015-01-01 
> 
>         Copyright (C) 1986-1993, 1998, 2004, 2007-2015
>         Thomas Williams, Colin Kelley and many others
> 
>         gnuplot home:     http://www.gnuplot.info
>         faq, bugs, etc:   type "help FAQ"
>         immediate help:   type "help"  (plot window: hit 'h')
> 
> 
> On Mon, 9 Feb 2015 00:26:20 -0500
> Jonathan Thornburg <jt...@as...> wrote:
> 
> > Hi,
> > 
> > On Sun, Feb 08, 2015 at 07:37:15PM -0800, Philipp K. Janert wrote:
> > > It used to be possible to pipe commands to gnuplot:
> > > 
> > > 	cat script.gp | gnuplot
> > > 
> > > When I try this with gp5, gnuplot seems to ignore 
> > > the input. 
> > > 
> > > I did not see any comment on this in the documentation
> > > either way. What behavior should I expect?
> > 
> > Piping commands to gnuplot works fine for me with gnuplot 5.0.0
> > running on OpenBSD 5.6.  In fact, I often do this for visualization:
> > I've written a Tk/Perl program 'slider' which provides a GUI to walk
> > through a data set, and outputs gnuplot commands for visualization;
> > I use it via shell scripts like this one:
> > 
> > #!/bin/sh
> > slider --min   401.022164175591         \
> >        --delta   1.00255541043898       \
> >        --max   501.277705219488         \
> >        --continuous                     \
> >        --command-file ../Phi.rl1-4.3D-slider-gnuplot-template \
> >   | gnuplot
> > 
> > For a standalone test:
> > 
> > % uname -a
> > OpenBSD copper.astro.indiana.edu 5.6 GENERIC.MP#0 amd64
> > % echo 'show version long' | gnuplot
> > 
> >         G N U P L O T
> >         Version 5.0 patchlevel 0    last modified 2015-01-01 
> > 
> >         Copyright (C) 1986-1993, 1998, 2004, 2007-2015
> >         Thomas Williams, Colin Kelley and many others
> > 
> >         gnuplot home:     http://www.gnuplot.info
> >         faq, bugs, etc:   type "help FAQ"
> >         immediate help:   type "help"  (plot window: hit 'h')
> > Compile options:
> > -READLINE  +LIBREADLINE  -HISTORY  
> > -BACKWARDS_COMPATIBILITY  +BINARY_DATA  
> > +GD_PNG  +GD_JPEG  +GD_TTF  +GD_GIF  +ANIMATION  
> > -USE_CWDRC  +X11  +X11_POLYGON  +MULTIBYTE  +X11_EXTERNAL +USE_MOUSE
> > +HIDDEN3D_QUADTREE +DATASTRINGS  +HISTOGRAMS  +OBJECTS  +STRINGVARS
> > +MACROS  +THIN_SPLINES  +IMAGE  +USER_LINETYPES +STATS
> > +EXTERNAL_FUNCTIONS 
> > 
> > GNUPLOT_DRIVER_DIR = "/usr/local/libexec/gnuplot/5.0"
> > GNUPLOT_PS_DIR     = "/usr/local/share/gnuplot/5.0/PostScript"
> > HELPFILE           = "/usr/local/share/gnuplot/5.0/gnuplot.gih"
> > 
> > % echo 'set term x11 persist; plot sin(x)' | gnuplot
> > % 
> > 
> > That last command produced an X window with the plot.
> > 
> > 
> > What gnuplot version are you using, and on what system?