"""
Difference Scorer
-----------------
This scorer simply computes the elementwise difference
between two series. If the two series are multivariate, it
returns a multivariate series.
"""
from darts.ad.scorers.scorers import NonFittableAnomalyScorer
from darts.timeseries import TimeSeries
[docs]class DifferenceScorer(NonFittableAnomalyScorer):
def __init__(self) -> None:
super().__init__(univariate_scorer=False, window=1)
def __str__(self):
return "Difference"
def _score_core_from_prediction(
self,
actual_series: TimeSeries,
pred_series: TimeSeries,
) -> TimeSeries:
self._assert_deterministic(actual_series, "actual_series")
self._assert_deterministic(pred_series, "pred_series")
return actual_series - pred_series