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RDD graph without zero in Y axis.

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rrd graph
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  • L
    linuxlion
    last edited by Feb 3, 2025, 8:23 AM

    I use the RDD graph to show the course of air pressure.
    The rise in air pressure from 1020 to 1024 is only a 0.4% increase.
    On a y axis from 0 to 1024, that 0.4 % rise is barely noticeable.
    Is it possible to set RDD so that the Y axis runs from, say, 940 to 1040?
    Then an increase from, say, 1020 to 1024 would be more visible.

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    • S
      stephenw10 Netgate Administrator
      last edited by Feb 4, 2025, 1:48 AM

      --alt-autoscale looks like it should do it.

      https://oss.oetiker.ch/rrdtool/doc/rrdgraph.en.html

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      • L
        linuxlion
        last edited by Feb 5, 2025, 7:34 AM

        Re: RDD graph without zero in Y axis.

        The option --alt-autoscale give me unfortunately not what I need.
        The first image is made without the option alt-autoscale.
        The second image is made with the option alt-autoscale.
        The only difference is the position of 0 in the Y-axis.
        Also the options alt-autoscale-min and alt-autoscale-max give me not what i need.
        I want to see on the Y-axis only the part between 940 and 1040.

        air_pressure_normal_scale.png air_pressure_altautoscale.png

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        • L
          linuxlion
          last edited by Feb 5, 2025, 7:38 AM

          The option --alt-autoscale give me unfortunately not what I need.
          The first image is made without the option alt-autoscale.
          The second image is made with the option alt-autoscale.
          The only difference is the position of 0 in the Y-axis.
          Also the options alt-autoscale-min and alt-autoscale-max give me not what i need.
          I want to see on the Y-axis only the part between 940 and 1040.

          air_pressure_normal_scale.png
          air_pressure_altautoscale.png

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