solarforecastarbiter.metrics.deterministic.mean_absolute_percentage¶
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solarforecastarbiter.metrics.deterministic.
mean_absolute_percentage
(obs, fx, error_fnc=<function error>)[source]¶ Mean absolute percentage error (MAPE).
\[\text{MAPE} = 1/n \sum_{i=1}^n | (\text{fx}_i - \text{obs}_i) / \text{obs}_i | * 100%\]Parameters: - obs ((n,) array-like) – Observed values.
- fx ((n,) array-like) – Forecasted values.
- error_fnc (function) – A function that returns the error, default fx - obs. First argument is obs, second argument is fx.
Returns: mape (float) – The MAPE [%] of the forecast.