What is wrong please with this graph? I would like to plot four graph in one picture. It displays two graphs. I would like to have one legends with 3 titles, because there are three color used. Then I don't know how to write two titles - one for graphs in left and one for graphs in right.
I would like to have 4 differents plot 2x2 - I have 4 plot in script. I there is lots of mistake.
set tics out nomirror
set encoding iso_8859_1
unset xtics
set ylabel "{/:Italic F} [a. u.]" font "Segoe UI,12" offset 2,0
set ytics nomirror font "Segoe UI,12"
set lmargin screen 0.2 #levý prostor vedle graf
set rmargin screen 0.9 #pravý prostor vedle grafu
set multiplot layout 2,2
set bmargin screen 0.40
set key Left reverse out horiz
set format y "%.2f"
set key tc variable
set xrange [4272:4500]
set yrange [0.7:1.02]
set title "Title 1" font "Segoe UI,12"
set title "Title 2" font "Segoe UI,12"
plot \
x title "Fitted" with lines linecolor rgb "red" lw 1.5,\
x title "Measured" with lines linecolor rgb "black" lw 1.5
unset ytics
set y2tics
set link y2
unset ylabel
set y2label "{/:Italic F} [a. u.]" font "Segoe UI,12" offset 1,0
set tmargin screen 0.4 #posun horní čáry dolního graf
set bmargin screen 0.15 #posun dolní čáry dolního graf
unset key
set tics out nomirror
set xlabel "{/:Italic {/Symbol l}} ({\305})" font "Segoe UI,12"
set xrange [4272:4500]
set yrange [-0.05:0.03]
plot x title "Measured - fitted" with lines linecolor rgb "navy" lw 1.5
set margin
set margin
plot \
x title "Fitted" with lines linecolor rgb "red" lw 1.5,\
x title "Measured" with lines linecolor rgb "black" lw 1.5
set margin
set margin
plot x title "Measured - fitted" with lines linecolor rgb "navy" lw 1.5
set title ...
before the plot commands. – theozh