File: mean.awk

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traceroute 1.4a12-21
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/^ *[0-9]/	{
	# print out the average time to each hop along a route.
	tottime = 0; n = 0;
	for (f = 5; f <= NF; ++f) {
		if ($f == "ms") {
			tottime += $(f - 1)
			++n
		}
	}
	if (n > 0)
		print $1, tottime/n, median
}