set terminal postscript enhanced

set key left bottom

set title "2-D Interpolation Error Data, Order 2"

set xlabel "Number of Extra Points, S_k"
set ylabel "RMS of total error"

set log xy

plot 'rms.out' u 1:2  t 'Resolution 1' w lp, \
     ''        u 1:6  t 'Resolution 2' w lp, \
     ''        u 1:10 t 'Resolution 3' w lp, \
     ''        u 1:14 t 'Resolution 4' w lp;