about summary refs log tree commit homepage
path: root/lib/dtas/util.rb
blob: 0b89346905a5f3a4a0d97bbde90995e909189097 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
# -*- encoding: binary -*-
# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net>
# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
require_relative '../dtas'

# in case we need to convert DB values to a linear scale
module DTAS::Util # :nodoc:
  def db_to_linear(val)
    Math.exp(val * Math.log(10) * 0.05)
  end

  def linear_to_db(val)
    Math.log10(val) * 20
  end
end