[Gnuplot-info] How to get graph coordinate?

[smms <sm...@ho...>]

I have seven plots each with different x and y ranges. I need to put a
vertical line in each plot at a fixed graph coordinate. I understand to do
that I need to know the graph coordinates. For example, for one plot, I have
the following ranges and I am trying to add a vertical line by,

set xrange [0:10]
set yrange [0:100]
set arrow from first 2, graph 0 to first 2, graph 1 nohead

But for a different plot I cant use the same set arrow option due to varying
first <value>. How can I get the equivalent graph coordinate to solve this
problem? 

Any help will be appreciated.





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