gnuplot_script

#!/usr/bin/gnuplot
set terminal png
set output "hist.png"
set boxwidth 50
set style fill solid
set style histogram
set style data histogram
bw=1
set xlabel "CPU frequency in MHz"
set ylabel "Counts"

stats "data.txt"

bin(x,width)=width*floor(x/width) + bw/1.0
plot "data.txt" using (bin($1,bw)):(2.0) smooth freq with boxes