set terminal pngcairo size 1000,600 enhanced font "Helvetica,20"
set output "fig1.png"

set multiplot
set xlabel "Multipole l" font "Helvetica,15"  # réduisez la taille de la police pour la rendre plus mince
set ylabel "[l(l+1)C_{l}/2{/Symbol p}] {/Symbol m}K^{2}" font "Helvetica,15"

set xrange [-1600:2000]
set yrange [0:6500]
set xtics (500,1000,1500,2000) font "Helvetica,15"  # réduisez la taille de la police pour la rendre plus mince
set ytics font "Helvetica,15"  # réduisez la taille de la police pour la rendre plus mince

set style line 1 linewidth 4 linecolor rgb "red"
set style line 2 linewidth 2 linecolor rgb "blue"
set style line 3 dashtype 2 linewidth 1 linecolor rgb "#888888"

set grid xtics ytics linestyle 3
set key outside right top width 1.5 height 1 box linestyle 1 linecolor rgb "black" font "Helvetica,12"  # réduisez la taille de la police pour la rendre plus mince

plot "./CMB_TT_full.txt" u ($1>=200?$1:0/0):2 w l ls 2 ti "Planck data",\
'./test_scalCls_Om_0.3_Ol_07.dat' u ($1>=200?$1:0/0):2 w l ls 1 ti "{/Symbol W}_{m}=0.3 {/Symbol W}_{/Symbol L}=0.7"

set xrange [1:4e4]
set logscale x
set format x "10^{%T}"
set xtics 1,10,200 font "Helvetica,15"  # réduisez la taille de la police pour la rendre plus mince

plot "./CMB_TT_full.txt" u ($1<=200?$1:0/0):2 w l ls 2 ti "Planck data",\
'./test_scalCls_Om_0.3_Ol_07.dat' u ($1<=200?$1:0/0):2 w l ls 1 ti "{/Symbol W}_{m}=0.3 {/Symbol W}_{/Symbol L}=0.7"

unset multiplot
set output