mean.awk revision 285830 
1178476Sjb/^ *[0-9]/	{
2178476Sjb	# print out the average time to each hop along a route.
3178476Sjb	tottime = 0; n = 0;
4178476Sjb	for (f = 5; f <= NF; ++f) {
5178476Sjb		if ($f == "ms") {
6178476Sjb			tottime += $(f - 1)
7178476Sjb			++n
8178476Sjb		}
9178476Sjb	}
10178476Sjb	if (n > 0)
11178476Sjb		print $1, tottime/n, median
12178476Sjb}
13178476Sjb