solarforecastarbiter.metrics.probabilistic.resolution

solarforecastarbiter.metrics.probabilistic.resolution(obs, fx, fx_prob)[source]

Resolution (RES) of the forecast.

RES = 1/n sum_{i=1}^I N_i (o_{i,avg} - o_{avg})^2

where n is the total number of forecasts, I is the number of unique forecasts (f_1, f_2, …, f_I), N_i is the number of times each unique forecast occurs, o_{i,avg} is the average of the observed events during which the forecast was f_i, and o_{avg} is the average of all observed events.

Parameters:
  • obs ((n,) array_like) – Observations (physical unit).
  • fx ((n,) array_like) – Forecasts (physical units) of the right-hand-side of a CDF interval, e.g., fx = 10 MW is interpreted as forecasting <= 10 MW.
  • fx_prob ((n,) array_like) – Probability [%] associated with the forecasts.
Returns:

  • res (float) – The resolution of the forecast [unitless], where higher values are better.
  • See Also
  • ———
  • brier_decomposition (3-component decomposition of the Brier Score)