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Entry  24 Jun 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
    Reply  24 Jun 2021, Stefan Ritt, Bug Fix, changes in history plots 
       Reply  25 Jun 2021, Marco Francesconi, Bug Fix, changes in history plots 
          Reply  25 Jun 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
       Reply  25 Jun 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
          Reply  25 Jun 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
    Reply  25 Jun 2021, Stefan Ritt, Bug Fix, changes in history plots 
       Reply  25 Jun 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
    Reply  30 Jun 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
       Reply  14 Jul 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
          Reply  14 Jul 2021, Konstantin Olchanski, Bug Fix, changes in history plots 
             Reply  24 Aug 2021, Stefan Ritt, Bug Fix, changes in history plots 
Message ID: 2235     Entry time: 25 Jun 2021     In reply to: 2231     Reply to this: 2239
Author: Marco Francesconi 
Topic: Bug Fix 
Subject: changes in history plots 
We are using the new history formula as a quick way to convert signals from sensors to actual physical values (for example Voltage->Temperature, Voltage->relative humidity 
...), so it is great that the shown voltage is the calculated one.

I would like to add a point to this discussion.
In our collaboration people attach images of history plots to elogs, meeting presentation and/or physical logbooks.
The proposed scaling formula may work fine online using the cursors, but, once an image is created, I do not understand how it is possible to extract the value for a scaled 
variables.
Suppose you see a graph in a presentation with a current increase by some PSU and the current was scaled to be in the same plot of the voltage.
Looking at the delta in the image, how can you judge the current increase without any axis/grid to refer to?

So I support Stefan proposal for a secondary axis, as long as it is clear which value belong to which axis.
Maybe marking the channels in the description or using different line styles/thickness?

Best,
Marco
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