set terminal postscript enhanced set key left top set title "2-D Interpolation Timing Data, order 3" set xlabel "Number of Extra Points, S_k" set ylabel "Average Interpolation Time (s)" set yrange [0.0:0.08] plot 'time.out' u 1:3 t 'Resolution 1' w lp, \ '' u 1:7 t 'Resolution 2' w lp, \ '' u 1:11 t 'Resolution 3' w lp, \ '' u 1:15 t 'Resolution 4' w lp;