From 0f72eedd37285e59a2e93932e4a2c1c967053376 Mon Sep 17 00:00:00 2001
From: Peter Baratta <peter.baratta@gmail.com>
Date: Mon, 10 Jun 2013 10:51:17 -0400
Subject: [PATCH] Add variable i as an imaginary unit

---
 common/lib/calc/calc.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/lib/calc/calc.py b/common/lib/calc/calc.py
index d3874639bc..3afc0f91bc 100644
--- a/common/lib/calc/calc.py
+++ b/common/lib/calc/calc.py
@@ -57,7 +57,8 @@ DEFAULT_FUNCTIONS = {'sin': numpy.sin,
                      'arccsch': calcfunctions.arccsch,
                      'arccoth': calcfunctions.arccoth
                      }
-DEFAULT_VARIABLES = {'j': numpy.complex(0, 1),
+DEFAULT_VARIABLES = {'i': numpy.complex(0, 1),
+                     'j': numpy.complex(0, 1),
                      'e': numpy.e,
                      'pi': numpy.pi,
                      'k': scipy.constants.k,