BUG #354 var and stdev ddof

README.md

@@ -112,7 +112,7 @@ $ pip install pandas_ta
 
 Latest Version
 --------------
-Best choice! Version: *0.3.12b*
+Best choice! Version: *0.3.13b*
 * Includes all fixes and updates between **pypi** and what is covered in this README.
 ```sh
 $ pip install -U git+https://github.com/twopirllc/pandas-ta

pandas_ta/statistics/stdev.py

@@ -9,7 +9,7 @@ def stdev(close, length=None, ddof=None, talib=None, offset=None, **kwargs):
     """Indicator: Standard Deviation"""
     # Validate Arguments
     length = int(length) if length and length > 0 else 30
-    ddof = int(ddof) if ddof and ddof >= 0 and ddof < length else 1
+    ddof = int(ddof) if isinstance(ddof, int) and ddof >= 0 and ddof < length else 1
     close = verify_series(close, length)
     offset = get_offset(offset)
     mode_tal = bool(talib) if isinstance(talib, bool) else True

pandas_ta/statistics/variance.py

@@ -7,7 +7,7 @@ def variance(close, length=None, ddof=None, talib=None, offset=None, **kwargs):
     """Indicator: Variance"""
     # Validate Arguments
     length = int(length) if length and length > 1 else 30
-    ddof = int(ddof) if ddof and ddof >= 0 and ddof < length else 0
+    ddof = int(ddof) if isinstance(ddof, int) and ddof >= 0 and ddof < length else 1
     min_periods = int(kwargs["min_periods"]) if "min_periods" in kwargs and kwargs["min_periods"] is not None else length
     close = verify_series(close, max(length, min_periods))
     offset = get_offset(offset)

setup.py

@@ -19,7 +19,7 @@ setup(
         "pandas_ta.volatility",
         "pandas_ta.volume"
     ],
-    version=".".join(("0", "3", "12b")),
+    version=".".join(("0", "3", "13b")),
     description=long_description,
     long_description=long_description,
     author="Kevin Johnson",