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Tuple<TimeSeries, List<Offset>> -> FeatureSequence
Construct feature vectors for each time step by concatenating the current value with past values extracted at specified index offsets.
Problem it solves
Transformers struggle to capture precise temporal periods and seasonalities without explicit relative-time reference features.
Consumes
Emits
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.