pandas.Series.autocorr
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Series.autocorr(lag=1)[source]
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Lag-N autocorrelation Parameters: lag : int, default 1 Number of lags to apply before performing autocorrelation. Returns: autocorr : float 
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Licensed under the 3-clause BSD License.
    https://pandas.pydata.org/pandas-docs/version/0.20.3/generated/pandas.Series.autocorr.html