set terminal postscript eps 'Helvetica' 15
set size 0.5, 0.5
set xtics 0,50 
set xrange [0:220]
set yrange [0:1]
set key 220,0.75
set xlabel "N (number of features)"
set ylabel "Purity"
set title 'N vs. Purity'
set output 'cluster_purities_N.eps'
plot 'genicN.dat' u 1:2 with lp lt -1 pt 1 t "GenIc", 'kmeansN.dat' u 1:2 with lp lt 1 pt 0 t "K-Means", 'canopyN.dat' u 1:2 with lp lt 1 pt 6 t "Canopy"