[Bug 476591] [NEW] cdck generated plot-file can't read from gnuplot

[gregor herrmann]

On Fri, 06 Nov 2009 15:40:15 -0000, Lödur wrote:

> I've read in the manual page of cdck, that I can save the result in a dat-file to represent it with gnuplot.
> But the generated dat-file can't read from gnuplot.
> 
> o Now I opened a gnome -terminal and typing the following and press [Enter]:
> cdck -p

And then?

My guess:
* You got the file cdck-plot.dat~
* You ran `gnuplot cdck-plot.dat~' and got:

#v+
gregoa at belanna:/tmp$ gnuplot cdck-plot.dat~ 

0 9
^
"cdck-plot.dat~", line 2: invalid command

gregoa at belanna:/tmp$
#v-

After reading a bit about gnuplot it seems that this is not the way
to actually plot a datafile. What works for me is (plot.dat is a
shortened version of your cdck-plot.dat~):

#v+
gregoa at belanna:/tmp$ gnuplot

        G N U P L O T
        Version 4.2 patchlevel 6 
        last modified Sep 2009
        System: Linux 2.6.31.200910290028

        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 'wxt'
gnuplot> plot "plot.dat"
[enjoy plot]
gnuplot> q
gregoa at belanna:/tmp$
#v-

Another option would be to add
    plot '-'
as the first line of the datafile and
    end
    pause -1
at the end, then `gnuplot plot.dat' also works; but I'm nor sure the
"pause -1" is what's wanted in each case.


IMO there is no real bug in cdck, but I cann add a note to the manpage
about how to use the datafile.

Cheers,
gregor (cdck maintainer in Debian) 
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cdck generated plot-file can't read from gnuplot
https://bugs.launchpad.net/bugs/476591
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