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Contents
# encoding: ascii-8bit
# Copyright 2014 Ball Aerospace & Technologies Corp.
# All Rights Reserved.
#
# This program is free software; you can modify and/or redistribute it
# under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 3 with
# attribution addendums as found in the LICENSE.txt
require 'cosmos/processors/processor'
module Cosmos
class StatisticsProcessor < Processor
# @return [Array] The set of samples stored by the processor
attr_accessor :samples
# @param item_name [String] The name of the item to gather statistics on
# @param samples_to_average [Integer] The number of samples to store for calculations
# @param value_type #See Processor::initialize
def initialize(item_name, samples_to_average, value_type = :CONVERTED)
super(value_type)
@item_name = item_name.to_s.upcase
@samples_to_average = Integer(samples_to_average)
reset()
end
# Run statistics on the item
#
# See Processor#call
def call(packet, buffer)
value = packet.read(@item_name, @value_type, buffer)
@samples << value
@samples = @samples[-@samples_to_average..-1] if @samples.length > @samples_to_average
mean, stddev = Math.stddev_sample(@samples)
@results[:MAX] = @samples.max
@results[:MIN] = @samples.min
@results[:MEAN] = mean
@results[:STDDEV] = stddev
end
# Reset any state
def reset
@samples = []
@results[:MAX] = nil
@results[:MIN] = nil
@results[:MEAN] = nil
@results[:STDDEV] = nil
end
# Make a light weight clone of this processor. This only creates a new hash of results
#
# @return [Processor] A copy of the processor with a new hash of results
def clone
processor = super()
processor.samples = processor.samples.clone
processor
end
alias dup clone
end # class StatisticsProcessor
end # module Cosmos
Version data entries
21 entries across 21 versions & 1 rubygems