07-16-2009
Unofrtunately, I'm new to Unix and don't know how the head and tail can calculate the median, but I thought that the dollar sign is a trick. This is why I asked the question in the first place.
Does anyone know how to calculate the mean, then?
---------- Post updated at 08:14 AM ---------- Previous update was at 08:10 AM ----------
sorry, I meant how to calculate the median
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LEARN ABOUT DEBIAN
smokeping_matchers_median
..::lib::Smokeping::matchers::Median(3) SmokePing ..::lib::Smokeping::matchers::Median(3)
NAME
Smokeping::matchers::Median - Find persistant changes in latency
OVERVIEW
The idea behind this matcher is to find sustained changes in latency.
The median matcher takes a number of past median latencies. It splits the latencies into two groups (old and new) and again finds the
median for each groups. If the difference between the two medians is bigger than a certain value, it will give a match.
DESCRIPTION
Call the matcher with the following sequence:
type = matcher
pattern = Median(old=>x,new=>y,diff=>z)
This will create a matcher which consumes x+y latency-datapoints, builds the two medians and the matches if the difference between the
median latency is larger than z seconds.
COPYRIGHT
Copyright (c) 2004 by OETIKER+PARTNER AG. All rights reserved.
LICENSE
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
AUTHOR
Tobias Oetiker <tobi@oetiker.ch>
2.6.8 2012-02-26 ..::lib::Smokeping::matchers::Median(3)