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Groups > comp.graphics.apps.gnuplot > #451

parsing of alphanumeric columns; plotting fences

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Hi alle
Searched a lot but did not find an answer.
May somebody of you has an idea:
I have a data file providing the following tab separated data format:

#date                time          total
2011-06-27        13:19:26    2339
2011-06-27        13:35:50    3322
2011-06-27        13:37:13    2740
2011-06-27        14:19:26    2339

Where "total" should be the z-coordinate, time the x-coordinate, and
date the y-coordinate
I would like to have the totals of each day in a kind of 3D fences
plot, so that I can compare
the totals of each day easily (see also: "fence plot" in
http://www.gnuplot.info/demo/surface1.html).

To manage the x-coordinate from column 2, I set up:

set xdata time
set timefmt "%H:%M:%S"
set format x "%H:%M:%S"

But how can I now extract the day as an y-coordinate from column 1?

My approach to plot some kind of fence was:

splot     "datafile.txt" using 2:$1[9:10]:13:xticlabels(2) with lines

but that did not work. I always get an error:
"internal error: substring range operator applied to non-STRING type"

Would it be easier if I created a separate data-file for each day?
If yes how could I then plot fences of each day?

I appreciate any help

Best regards Ralf

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parsing of alphanumeric columns; plotting fences derrapf <derrapf@googlemail.com> - 2011-07-19 04:29 -0700
  Re: parsing of alphanumeric columns; plotting fences Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-07-19 21:54 +0200
    Re: parsing of alphanumeric columns; plotting fences derrapf <derrapf@googlemail.com> - 2011-07-21 06:02 -0700
      Re: parsing of alphanumeric columns; plotting fences Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-07-21 20:24 +0200
        Re: parsing of alphanumeric columns; plotting fences derrapf <derrapf@googlemail.com> - 2011-07-22 16:22 -0700
          Re: parsing of alphanumeric columns; plotting fences Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2011-07-23 15:04 +0200

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