[Gnuplot-info] Gnuplot's internal sequence

[Alan C. <ala...@gm...>]

My data is data points contained in an input file.  What I'd like to
do is something like:

  set y2range [(1.8*GPVAL_Y_MIN)+32:(1.8*GPVAL_Y_MAX)+32]

But GPVAL_Y_MIN and GPVAL_Y_MAX apparently aren't defined until the
read is complete, and putting things like y2range or y2ticks after the
read seems to have no effect.  I tried refresh and replot after the y2
stuff, even a 2nd plot line.

Is there a way to do a dummy read that just sets up the min/max stuff?

reset
set terminal gif size 1200,800
set output "2labc.gif"
set xdata time
set timefmt x "%s"
set format x "%H:%M\n%D"
set style data lines
set xtics auto
#  GPVAL_Y_MIN etc aren't defined yet
#set y2range [(1.8*GPVAL_Y_MIN)+32:(1.8*GPVAL_Y_MAX)+32]
set y2label "Fahrenheit"
plot "outvals.tab" using ($1-(4*3600)):2 notitle
# These have no effect:
#set y2range [(1.8*GPVAL_Y_MIN)+32:(1.8*GPVAL_Y_MAX)+32]
#set y2tics auto
#refresh


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