Contents

require File.expand_path("../signal_tools/stock_data", __FILE__)
require File.expand_path("../signal_tools/stock", __FILE__)

module SignalTools
  VERSION = '0.2.0'

  def self.sum(array)
    array.inject(0) {|accum, c| accum + c.to_f }
  end

  def self.average(array)
    return nil if !array || array.size == 0
    sum(array).to_f / array.size
  end

  # Truncates all arrays to the size of the shortest array by cutting off the front
  # of the longer arrays.
  def self.truncate_to_shortest!(*arrays)
    shortest_size = arrays.inject(arrays.first.size) { |size, array| array.size < size ? array.size : size }
    arrays.each { |array| array.slice!(0...(array.size - shortest_size)) }
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
signal_tools-0.2.1	lib/signal_tools.rb
signal_tools-0.2.0	lib/signal_tools.rb