def _compute_anom_score(self, lag_window_points, point):
ema = utils.compute_ema(self.smoothing_factor, lag_window_points)[-<NUM_LIT:1>]<EOL>return abs(point - ema)<EOL>
Compute anomaly score for a single data point.
Anomaly score for a single data point(t,v) equals: abs(v - ema(lagging window)).
:param list lag_window_points: values in the lagging window.
:param float point: data point value.
:return float: the anomaly score.