set xlabel 'Lambda' set ylabel 'LDOS enhancement' plot 'Bowtie35_Fine.LDOS' u (2*pi/$4):6 t 'LDOS, D=35 nm' w lp pt 7 ps 1 \ , 'Bowtie65_Fine.LDOS' u (2*pi/$4):6 t 'LDOS, D=65 nm' w lp pt 7 ps 1 \ , 'Bowtie95_Fine.LDOS' u (2*pi/$4):6 t 'LDOS, D=95 nm' w lp pt 7 ps 1