climpred.metrics._smape

climpred.metrics._smape(forecast, verif, dim=None, **metric_kwargs)[source]

Symmetric Mean Absolute Percentage Error (sMAPE).

Similar to the Mean Absolute Percentage Error (mape), but sums the forecast and observation mean in the denominator.

sMAPE = \frac{1}{n} \sum \frac{|f-o|}{|f|+|o|}

Parameters

  • forecast (xarray object) – Forecast.

  • verif (xarray object) – Verification data.

  • dim (str) – Dimension(s) to perform metric over.

  • metric_kwargs (dict) – see smape()

Details:

minimum

0.0

maximum

1.0

perfect

0.0

orientation

negative

See also