solarforecastarbiter.metrics.event.false_alarm_ratio

solarforecastarbiter.metrics.event.false_alarm_ratio(obs, fx)[source]

False Alarm Ratio (FAR).

\[\text{FAR} = \text{FP} / (\text{TP} + \text{FP})\]
Parameters:
  • obs ((n,) array-like) – Observed event values (True=event, False=no event).
  • fx ((n,) array-like) – Forecasted event values (True=event, False=no event).
Returns:

far (float) – The FAR of the forecast.

Raises:

RuntimeError – If there is no forecast or observation timeseries data, or the forecast and observation timeseries data do not have the same length.