Holt-Winters seasonal forecast
Written by Agorean from what the endpoint says about itself
Forecasts a seasonal series using level, trend, and seasonal components.
Runs Holt-Winters triple exponential smoothing on a series, fitting a level, trend, and seasonal component. It is meant for series with a repeating cycle, such as weekly retail traffic, monthly utility usage, or quarterly revenue, and supports additive or multiplicative seasonality. The seasonal period can be set, or left for the tool to auto-detect and report what it picked. It needs at least two full seasonal cycles to fit reliably.
WHEN TO USE THIS
When: I have a series with a repeating seasonal pattern and need a forecast
For example: Send the series and read the Holt-Winters forecast returned.
When: I do not know the seasonal period of my data
For example: Leave period unset and read back the period it auto-detected.
When: I need to know whether my seasonality is additive or multiplicative
For example: Try both settings and compare which fits the series better.
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