SMAPE¶
- class pytorch_forecasting.metrics.SMAPE(reduction: str = 'mean', **kwargs)[source]¶
Bases:
pytorch_forecasting.metrics.MultiHorizonMetric
Symmetric mean absolute percentage. Assumes
y >= 0
.Defined as
2*(y - y_pred).abs() / (y.abs() + y_pred.abs())
Initialize metric
- Parameters
name (str) – metric name. Defaults to class name.
quantiles (List[float], optional) – quantiles for probability range. Defaults to None.
reduction (str, optional) – Reduction, “none”, “mean” or “sqrt-mean”. Defaults to “mean”.
Methods
loss
(y_pred, target)Calculate loss without reduction.