Normalize the LabNation export for my air conditioner, so each pulse is exactly 1.04

normalize.rb

#!/usr/bin/env ruby -w
require 'csv'

file = ARGV[0]
out = file.split('.').join('-normalized.')

unless file
  puts "Usage: normalize [filename]"
  exit(1)
end

CSV.open(out, 'w') do |csv|
  CSV.foreach(file) do |line|
    ts = line[0].to_f
    rounded = (ts - (ts % 1.04)).round(2)
    csv << [ rounded, line[1] ]
  end
end