solarforecastarbiter.metrics.deterministic.normalized_mean_absolute¶
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solarforecastarbiter.metrics.deterministic.
normalized_mean_absolute
(obs, fx, norm, error_fnc=<function error>)[source]¶ Normalized mean absolute error (NMAE).
\[\text{NMAE} = \text{MAE} / \text{norm} * 100%\]Parameters: - obs ((n,) array-like) – Observed values.
- fx ((n,) array-like) – Forecasted values.
- norm (float) – Normalized factor, in the same units as obs and fx.
- error_fnc (function) – A function that returns the error, default fx - obs. First argument is obs, second argument is fx.
Returns: nmae (float) – The NMAE [%] of the forecast.