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# scikits.statsmodels.sandbox.tsa.acovf

`scikits.statsmodels.sandbox.tsa.``acovf`(x, unbiased=True, demean=True)

  autocovariance for 1D

  Parameters: | x : array time series data unbiased : boolean if True, then denominators is n-k, otherwise n
  Returns: | acovf : array autocovariance function

  Notes

  This uses np.correlate which does full convolution. For very long time series it is recommended to use fft convolution instead.

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