- colwell_constancy(series, bins=11, freq='M', method='mean', normalize=True)[source]#
Colwells constancy index after Colwell .
series (pandas.Series) – Pandas Series with DatetimeIndex and head values.
bins (int) – number of bins to determine the states of the groundwater.
freq (str, optional) – frequency to resample the series to.
method (str, optional) – Method to use for resampling. Only “mean” is allowed now.
normalize (bool, optional) – normalize the time series to values between zero and one.
p, c, m – predictability, constancy, contingency
- Return type:
One minus the sum of entropy with respect to state, divided by the logarithm of the absolute number of possible states.