set datafile missing "?"
set xrange [0:14]
set xtics ("at" 0, "rl" 1, "ms" 2, "al" 3, "vm" 4, "at:rl" 5, "at:ms" 6, "at:al" 7, "at:vm" 8, "rl:ms" 9, "rl:al" 10, "rl:vm" 11, "ms:al" 12, "ms:vm" 13, "al:vm" 14)
set yrange [-1:1]
set style data linespoints  
plot 0 notitle, '@file@' using :1 title "new", '@file@' using :2 title "mode", '@file@' using :3 title "lbo", '@file@' using :4 title "alea"