1.cdf图
set terminal eps font ",15"
set output "acc.eps"
set size 0.6, 0.7
set xtics 10
set ytics 0.2
set xlabel "Accuracy"
set ylabel "CDF "
set key bottom right
set style rect fc lt -1 fs solid 0.15 noborder
set grid
plot "plot_a.txt" using (($1)):(1./69.) with linespoints title 'a' lw 5 lt 0 smooth cumulative, \