# File test/test_rrdtool.rb, line 33
  def create_data
    scale = 10
    ts = Time.now.to_i + 1
    while (ts < (@start.to_i + @step*300)) do
      @r.update "a:b", ["#{ts}:#{rand()}:#{Math.sin(ts / @step / 10)}"]
      ts += @step
    end
  end