--- /dev/null
+set terminal postscript eps
+set output "bench1.eps"
+set xlabel "R"
+set ylabel "time"
+plot "1000x1000.dat" title "isam 1000" with linespoints, \
+ "100x10000.dat" title "isam 100" with linespoints, \
+ "10x100000.dat" title "isam 10" with linespoints, \
+ "1x1000000.dat" title "isam 1" with linespoints