pyhctsa.operations.stationarity.trend¶
- pyhctsa.operations.stationarity.trend(y)¶
Quantifies various measures of trend in a time series.
This function analyzes trends by: 1. Computing ratio of standard deviations before/after linear detrending 2. Fitting a linear trend and extracting parameters 3. Analyzing statistics of the cumulative sum
For strong linear trends, the standard deviation ratio will be low since detrending removes significant variance.