set term png
set output "digest.png"
set xtics; set ytics
set grid xtics
set grid ytics
set mxtics; set mytics;
set xlabel "message size (bytes)"
set ylabel "time taken for message digest (milliseconds)"
set title "Time taken for message Digest"
plot "result.msgsize.SHA1.dat" title "SHA1" with linespoints, "result.msgsize.MD5.dat" title "MD5" with linespoints