DD2-monitor/viz/gnuplot/average4v.awk

#!/usr/bin/awk -f

BEGIN	{
	flag_debut = 1;
	}

	{
	if (flag_debut) {
		debut = $1
		flag_debut = 0
		}
	minutes = ($1-debut) / 60;
	val = ($2 + $3 + $4 + $5) / 4.0;
	print minutes, val;
	}