How to print median values of matrix -awk? Post: 302999605

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smokeping_matchers_medratio

..::lib::Smokeping::matchers::Medratio(3)			     SmokePing				 ..::lib::Smokeping::matchers::Medratio(3)

NAME

       Smokeping::matchers::Medratio - detect changes in the latency median

OVERVIEW

       The Medratio matcher establishes a historic median latency over several measurement rounds. It compares this median, against a second
       median latency value again build over several rounds of measurement.

       By looking at the median value this matcher is largly imune against spikes and will only react to long term developments.

DESCRIPTION

       Call the matcher with the following sequence:

	type = matcher
	pattern =  Medratio(historic=>a,current=>b,comparator=>o,percentage=>p)

       historic
	   The number of values to use for building the 'historic' median.

       current
	   The number of values to use for building the 'current' median.

       comparator
	   Which comparison operator should be used to compare current/historic with percentage.

       percentage
	   Right hand side of the comparison.

	 old <--- historic ---><--- current ---> now

EXAMPLE

       Take  the 12 last median values. Build the median out of the first 10 and the median from the other 2 values. Divide the results and decide
       if it is bigger than 150 percent.

	Medratio(historic=>10,current=>2,comparator=>'>',percentage=>150);

	med(current)/med(historic) > 150/100

       This means the matcher will activate when the current latency median is more than 1.5 times the historic latency median established over
       the last 10 rounds of measurement.

COPYRIGHT

       Copyright (c) 2006 by OETIKER+PARTNER AG. All rights reserved.

SPONSORSHIP

       The development of this matcher has been paied for by Virtela Communications, <http://www.virtela.net/>.

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::Medratio(3)