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pastas.stats.signatures.reversals_cv#

reversals_cv(series)[source]#

Coefficient of Variation in annual number of rises and falls.

Parameters

series (pandas.Series) – Pandas Series with DatetimeIndex and head values.

Returns

Coefficient of Variation in annual number of rises and falls.

Return type

float

Notes

Coefficient of Variation in annual number of rises and falls in daily head [Richter et al., 1996]. If the coefficient of variation is high, the number of reversals is highly variable, and vice versa. If the head data is not daily, a warning is issued and nan is returned.