solarforecastarbiter.metrics.deterministic.coeff_determination¶
-
solarforecastarbiter.metrics.deterministic.
coeff_determination
(obs, fx)[source]¶ Coefficient of determination (R^2).
\[R^2 = 1 - (A / B)\]where:
\[A = \sum_{i=1}^n (\text{obs}_i - \text{fx}_i)^2\]\[B = \sum_{i=1}^n (\text{obs}_i - \text{obs}_\text{avg})^2\]\[\text{obs}_\text{avg} = 1/n \sum_{i=1} \text{obs}_i\]Parameters: - obs ((n,) array-like) – Observed values.
- fx ((n,) array-like) – Forecasted values.
Returns: r2 (float) – The coefficient of determination (R^2 [-]) of the observations and forecasts.