set size 0.5,0.5
set ylabel "%"
set xlabel "predicted project types"
set xtics ("Xhigh" 0,"high" 1,"medium" 2,"low" 3)
set xrange [0:5]
set yrange [-5:70]
set title "Raw vs treated"
set terminal postscript eps
set output "coco.eps"
plot 'coco.dat' using 1 title "raw"        with linesp 1 0,\
     'coco.dat'  using 2 title "treated" with linesp 1 1,\
     'coco.dat'  using 3 title "result" with linesp 1  2