Expanding.var()
pandas.core.window.Expanding.var
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Expanding.var(ddof=1, **kwargs)
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expanding variance
Parameters: ddof : int, default 1
Delta Degrees of Freedom. The divisor used in calculations is
N - ddof
, whereN
represents the number of elements.Returns: same type as input
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© 2008–2014 the pandas development team
Licensed under the 3-clause BSD License.
http://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.core.window.Expanding.var.html