[Gnuplot-info] secondary axis related to primary axis

[SB <ste...@gm...>]

Hello,

is it possible to scale the secondary related to the primary x/y-axis? 

I want my autoscaled plots to show one scale on the primary y-Axis and a
related scale (in my case a proportional relation) on the secondary
y-Axis.

An example to make it clear: on the primary axis should be "Pressure in
bar" and on the second axis "Pressure in psi".
(and I am not even asking about °C and °F)
 
If this is not possible, is it, instead, possible to read the autoscale
information back to a user-defined variable so I can do the whole thing
"manually"? Is there maybe another workaround?

Thanks,

Stephan Bowe