1 files changed, 16 insertions, 0 deletions
diff --git a/lib/dtas/util.rb b/lib/dtas/util.rb
new file mode 100644
index 0000000..03c7ded
--- /dev/null
+++ b/lib/dtas/util.rb
@@ -0,0 +1,16 @@
+# -*- encoding: binary -*-
+# :stopdoc:
+# 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
+  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