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

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Thank you Hans-Bernhard for your kind answer.
If I correctly understand, xrange is actually a filter that I'm applying on x axis values (values that I should keep in the file, currently absent).

Actually I don't understand where the x values 01:06:00 to 01:07:18 are coming from, since i intentionally stored only the Z values in the file.

About my next tentative: should I change the binary file structure to contain all info (x,y,z = time, frequencies,z), which format should I use for time ? would be ok a 32 bit integer ? I remember of binary "matrix" format I've read about, would that be fine and able to contain integers for x,y and float for z ?

As an alternative to all that: would it be possible to just produce all the labels with some loop, avoiding usage of "xrange" so that i can get the plot with the current binary file structure? For me it's really important to keep file size at a minimum... that sample is 2.5 MB for 60 seconds of scan and I should work with about 20 files - 30 minutes each, something that i can plot in acceptable time (already tested).

Kind regards,
Mario

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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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