Quantile forecasts.
Shape: [numSeries, horizon, 10] as nested arrays.
Quantile indices: 0=mean, 1=q10, 2=q20, …, 5=q50, …, 9=q90.
OptionalbackcastModel reconstruction of historical context (backcast).
Only populated when returnBackcast is true.
Shape: [numSeries, contextLen] as an array of Float32Arrays.
The pure xreg contribution for each series.
Point (median) forecast. Shape:
[numSeries, horizon]as an array of Float32Arrays.