set title '2-D Interpolation Error Data, Resolution 1'

plot 'rms.out' u 1:2 t 'Order 2' w lp, \
     ''        u 1:3 t 'Order 3' w lp, \
     ''        u 1:4 t 'Order 4' w lp, \
     ''        u 1:5 t 'Order 5' w lp;