Can gnuplot calculate the distance between two lines or maybe two points?
I'm having a plot where two (main) lines are plotted. For the moment let's assume that the first line is always above the second one. Is there a way to calculate the distance from line 2 to line 1 at a given x-value?
here is a picture of what my plot looks like and which distance I want to calculate:
The vertical lines are just for style and have nothing to do with the actual plot, their data is stored in test.dat and test2.dat.
My data-files of the lines look like this:
line1
0 118.1
2.754 117.77
4.054 117.64
6.131 116.17
7.7 116.04
8.391 115.36
10.535 115.25
11.433 116.03
12.591 116.22
19.519 118.59
line2
19.4 118.51
15.2 116.56
10.9 115.94
10.35 114.93
9.05 114.92
8.3 115.9
5.9 116.19
4.2 116.62
2.2 117.66
-0.3 118.06
My plotting-code looks like this:
set term wxt enhanced
cd 'working directory'
unset key
set size 0.9,0.9
set origin 0.1,0.1
set title 'TITLE'
unset border
set label 21 " rotate by 45" at -3.0,0.0 rotate by 45 point ps 2
set xrange [0:19.519]
set yrange [110:119]
set xtics nomirror(0, 2.745, 4.054, 6.131, 7.7, 8.391, 10.535, 11.433, 12.591, 19.519) rotate by 90 offset 0,-0.1 right
set ytics " ", 30000
plot "line1.dat" using ($1):($2):2 with labels offset 1, 1.8 rotate by 90, "line1.dat" using 1:2 with lines lt 1 lw 1 lc rgb '#000000', +112 lt 1 lw 1 lc rgb '#000000' , 'test.dat' with lines lt 1 lw 1 lc rgb '#000000', +110 lt 1 lw 1 lc rgb '#000000', 'line2.dat' with lines lt 0.5 lw 1 lc rgb '#000000', 'test2.dat' with lines lt 0.5 lw 1 lc rgb '#000000'
