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Contents
#!/usr/bin/env ruby -w
# encoding: UTF-8
#
# = LinearPredictor.rb -- PostRunner - Manage the data from your Garmin sport devices.
#
# Copyright (c) 2015 by Chris Schlaeger <cs@taskjuggler.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
module PostRunner
# For now we use a trivial adaptive linear predictor that just uses the
# average of past values to predict the next value.
class LinearPredictor
# Create a new LinearPredictor object.
# @param n [Fixnum] The number of coefficients the predictor should use.
def initialize(n, default = nil)
@values = Array.new(n, default)
@size = n
@next = nil
end
# Tell the predictor about the actual next value.
# @param value [Float] next value
def insert(value)
@values << value
if @values.length > @size
@values.shift
@next = @values.reduce(:+) / @size
end
end
# @return [Float] The predicted value of the next sample.
def predict
@next
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems