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Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data

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From	Karl Ratzsch <mail.kfr@gmx.net>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data
Date	Wed, 2 Mar 2016 00:33:36 +0100
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Am 01.03.2016 um 14:58 schrieb Mario Cannistrà:
> They are created as a sequence of float values and I'm
> successfully reading them as array=8000x79   (for this test)
> where 8000 are the frequency bins and 79 are the scans made and
> recorded. Real files will reach at least 100 MB size and this is
> why they are in binary format and not in csv. For the same reason
> I'm storing only z values and NO x,y (timestamps, frequencies).
> 

Gnuplot cannot magically deduce the time & frequency from the range
settings. You need to calculate them from the indices $1 and $2 of
your matrix via a "using" statement:

  plot datafile binary matrix=... using (t($1)):(f($2)):3 with image

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chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Mario Cannistrà <mariocannistra@gmail.com> - 2016-03-01 05:58 -0800
  Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Mario Cannistrà <mariocannistra@gmail.com> - 2016-03-01 06:07 -0800
  Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2016-03-01 20:54 +0100
    Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Mario Cannistrà <mariocannistra@gmail.com> - 2016-03-01 13:07 -0800
      Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2016-03-01 23:29 +0100
        Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Mario Cannistrà <mariocannistra@gmail.com> - 2016-03-02 01:08 -0800
  Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Karl Ratzsch <mail.kfr@gmx.net> - 2016-03-02 00:33 +0100
    Re: chart disappears when i add xrange / yrange to binary array plot of radio spectrogram data Mario Cannistrà <mariocannistra@gmail.com> - 2016-03-02 01:13 -0800

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