[ Thanks to Dmitri
Popov for this link. ]
“To perform its magic, the script relies on the sqlite, gnuplot,
and imagemagick packages. On Ubuntu and Debian-based distributions,
you can install these packages running the apt-get install sqlite3,
gnuplot imagemagick command as root. Download then the latest
version of the script and make it executable using the chmod o+w
focalAnalyzer.sh command.”