set title "Delivery Ratio vs Temperature"set xlabel "Temperature"set ylabel "Delivery Ratio"set key title "Exploration Utility"set terminal postscript eps enhancedset output "analysed_results/temp-rewards-temp-1.ps"plot \    'analysed_results/temp-rewards-temp.data' index 0 using 2:4 title "-20" with linespoints lw 2,\    'analysed_results/temp-rewards-temp.data' index 1 using 2:4 title "-12" with linespoints lw 2,\    'analysed_results/temp-rewards-temp.data' index 2 using 2:4 title "-8" with linespoints lw 2,\    'analysed_results/temp-rewards-temp.data' index 3 using 2:4 title "-4" with linespoints lw 2,\    'analysed_results/temp-rewards-temp.data' index 4 using 2:4 title "-2" with linespoints lw 2