[rrd-users] Two different Y axis

[Olivier Nicole]

Hello,

I am brand new to rrdtool. My problem is the following.

I have several graph to plot where data have a different range, one
would vary from 0 to 15 while the other would vary from 255 to 0. Both
data are closely related (in fact they are proprotional).

I know how to normalize the data so they can plot on one graph, using
the full range for display both curves. What I would like to do is
being able to display an axis with values 0 to 15 on the left and with
values 0 to 255 on the right.

And then I would eventually like to be able to write something like "0
dB" to "15 dB" on the left axis, arther than 0 to 15.

Something like http://ai3gate.cs.ait.ac.th/comstream/images/oneday.gif
which I did with Gnuplot.

Rrdtool graphic looks much better, it has the average thingy that I
did not care to do, but the double axis is really needed for me (yes I
compare signal noise ratio and IP packet error on the same graph).

Thank you,

Olivier

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