plot_contr_pdf.gnuplot

# gnuplot -e "datafile='contr_tot_gdr12.dat'; outfile='fig_pdf12.pdf'; nneigh=6" plot_contr_pdf.gnuplot

set terminal pdf enhanced font ",12"
set output outfile

set xlabel "r"
set ylabel "pdf_{i}"

plot datafile u 1:2 w l lw 2 title "total", \
     for [t = 3:2+nneigh] datafile u 1:t w l title "neighbor ".(t-2)