https://liris.cnrs.fr/~crocaber/3Bim/Projet/
set pointsize 1
plot "< awk '{if($3 == "0") print}' output1_1500_0.9.txt" u 1:2 t "red" w p pt 2,
"< awk '{if($3 == "1") print}' output1_1500_0.9.txt" u 1:2 t "green" w p pt 2,
"< awk '{if($3 == "2") print}' output1_1500_0.9.txt" u 1:2 t "blue" w p pt 2,
"< awk '{if($3 == "3") print}' output1_1500_0.9.txt" u 1:2 t "orange" w p pt 2
set xrange [1:1500] set term png set output 'd001.png' set palette model RGB defined (0 "salmon",1 "web-blue", 2 "light-green") plot 'd0001.txt' using 1:2:3 notitle with points pt 157 palette