From 8abef95bb53ffc5e37c31132a1e9f644a7895930 Mon Sep 17 00:00:00 2001
From: Scott Sanderson <scoutoss@gmail.com>
Date: Fri, 18 Dec 2015 14:30:28 -0500
Subject: [PATCH] DOC: Rename exponential stddev.

ExponentialWeightedStandardDeviation -> ExponentialWeightedMovingStdDev.

This is more consistent with the other moving moment factors.
---
 docs/source/appendix.rst              |  2 +-
 docs/source/whatsnew/0.8.4.txt        |  2 +-
 tests/pipeline/test_engine.py         |  4 ++--
 zipline/pipeline/factors/__init__.py  |  4 ++--
 zipline/pipeline/factors/technical.py | 10 +++++-----
 5 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/docs/source/appendix.rst b/docs/source/appendix.rst
index 7119bf91..575aa5cf 100644
--- a/docs/source/appendix.rst
+++ b/docs/source/appendix.rst
@@ -63,7 +63,7 @@ Pipeline API
 .. autoclass:: zipline.pipeline.factors.ExponentialWeightedMovingAverage
    :members:
 
-.. autoclass:: zipline.pipeline.factors.ExponentialWeightedStandardDeviation
+.. autoclass:: zipline.pipeline.factors.ExponentialWeightedMovingStdDev
    :members:
 
 .. autofunction:: zipline.pipeline.factors.DollarVolume
diff --git a/docs/source/whatsnew/0.8.4.txt b/docs/source/whatsnew/0.8.4.txt
index 3b0376de..8eaa3522 100644
--- a/docs/source/whatsnew/0.8.4.txt
+++ b/docs/source/whatsnew/0.8.4.txt
@@ -56,7 +56,7 @@ Enhancements
   :class:`~zipline.pipeline.factors.DollarVolume`. (:issue:`910`).
 
 * Added :class:`~zipline.pipeline.factors.ExponentialWeightedMovingAverage` and
-  :class:`~zipline.pipeline.factors.ExponentialWeightedStandardDeviation`
+  :class:`~zipline.pipeline.factors.ExponentialWeightedMovingStdDev`
   factors. (:issue:`910`).
 
 Experimental Features
diff --git a/tests/pipeline/test_engine.py b/tests/pipeline/test_engine.py
index 480ea4c0..6174bf68 100644
--- a/tests/pipeline/test_engine.py
+++ b/tests/pipeline/test_engine.py
@@ -58,7 +58,7 @@ from zipline.pipeline.factors import (
     EWMA,
     EWMSTD,
     ExponentialWeightedMovingAverage,
-    ExponentialWeightedStandardDeviation,
+    ExponentialWeightedMovingStdDev,
     MaxDrawdown,
     SimpleMovingAverage,
 )
@@ -947,7 +947,7 @@ class ParameterizedFactorTestCase(TestCase):
 
     def test_ewm_aliasing(self):
         self.assertIs(ExponentialWeightedMovingAverage, EWMA)
-        self.assertIs(ExponentialWeightedStandardDeviation, EWMSTD)
+        self.assertIs(ExponentialWeightedMovingStdDev, EWMSTD)
 
     def test_dollar_volume(self):
         results = self.engine.run_pipeline(
diff --git a/zipline/pipeline/factors/__init__.py b/zipline/pipeline/factors/__init__.py
index f9924679..fabfa497 100644
--- a/zipline/pipeline/factors/__init__.py
+++ b/zipline/pipeline/factors/__init__.py
@@ -12,7 +12,7 @@ from .technical import (
     EWMA,
     EWMSTD,
     ExponentialWeightedMovingAverage,
-    ExponentialWeightedStandardDeviation,
+    ExponentialWeightedMovingStdDev,
     MaxDrawdown,
     RSI,
     Returns,
@@ -29,7 +29,7 @@ __all__ = [
     'EWMA',
     'EWMSTD',
     'ExponentialWeightedMovingAverage',
-    'ExponentialWeightedStandardDeviation',
+    'ExponentialWeightedMovingStdDev',
     'Factor',
     'Latest',
     'MaxDrawdown',
diff --git a/zipline/pipeline/factors/technical.py b/zipline/pipeline/factors/technical.py
index d9a75810..273618f2 100644
--- a/zipline/pipeline/factors/technical.py
+++ b/zipline/pipeline/factors/technical.py
@@ -206,7 +206,7 @@ class _ExponentialWeightedFactor(SingleInputMixin, CustomFactor):
         ----
         This classmethod is provided by both
         :class:`ExponentialWeightedMovingAverage` and
-        :class:`ExponentialWeightedStandardDeviation`.
+        :class:`ExponentialWeightedMovingStdDev`.
         """
         if span <= 1:
             raise ValueError(
@@ -252,7 +252,7 @@ class _ExponentialWeightedFactor(SingleInputMixin, CustomFactor):
         ----
         This classmethod is provided by both
         :class:`ExponentialWeightedMovingAverage` and
-        :class:`ExponentialWeightedStandardDeviation`.
+        :class:`ExponentialWeightedMovingStdDev`.
         """
         if halflife <= 0:
             raise ValueError(
@@ -296,7 +296,7 @@ class _ExponentialWeightedFactor(SingleInputMixin, CustomFactor):
         ----
         This classmethod is provided by both
         :class:`ExponentialWeightedMovingAverage` and
-        :class:`ExponentialWeightedStandardDeviation`.
+        :class:`ExponentialWeightedMovingStdDev`.
         """
         return cls(
             inputs=inputs,
@@ -343,7 +343,7 @@ class ExponentialWeightedMovingAverage(_ExponentialWeightedFactor):
         )
 
 
-class ExponentialWeightedStandardDeviation(_ExponentialWeightedFactor):
+class ExponentialWeightedMovingStdDev(_ExponentialWeightedFactor):
     """
     Exponentially Weighted Moving Standard Deviation
 
@@ -389,4 +389,4 @@ class ExponentialWeightedStandardDeviation(_ExponentialWeightedFactor):
 
 # Convenience aliases.
 EWMA = ExponentialWeightedMovingAverage
-EWMSTD = ExponentialWeightedStandardDeviation
+EWMSTD = ExponentialWeightedMovingStdDev