Expanding.mean()
pandas.core.window.Expanding.mean
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Expanding.mean(**kwargs)
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expanding mean
Parameters: how : string, default None (DEPRECATED)
Method for down- or re-sampling
Returns: same type as input
© 2011–2012 Lambda Foundry, Inc. and PyData Development Team
© 2008–2011 AQR Capital Management, LLC
© 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.mean.html