module SignalTools - signal_tools-0.3.1 Documentation

average(array) click to toggle source

# File lib/signal_tools.rb, line 16
def self.average(array)
  return nil if !array || array.size == 0
  sum(array).to_f / array.size
end

sum(array) click to toggle source

# File lib/signal_tools.rb, line 12
def self.sum(array)
  array.inject(0) {|accum, c| accum + c.to_f }
end

truncate_to_shortest!(*arrays) click to toggle source

Truncates all arrays to the size of the shortest array by cutting off the front of the longer arrays.

# File lib/signal_tools.rb, line 23
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