ref: 25a9fcc24ad00c6a406042818b9e6f2e7bba0dd1
dir: soundpipe/test/plot.plt
set terminal png size 900,400 font ',10' set bmargin 10 set output "demo.png" set nokey set style data histogram unset border set xtics rotate set xtics axis plot 'time.log' using 2:xtic(1) with boxes