Evaluating time series models is usually different from most other machine learning tasks as we usually don’t have i.i.d. data.

## Out-of-sample

If the sliding window size is 1, then we have the simplest out-of-sample holdout scenario.

## Cross-validation

Planted: by ;

L Ma (2022). 'Evaluating Time Series Models', Datumorphism, 04 April. Available at: https://datumorphism.leima.is/wiki/forecasting/evalutate-time-series-models/.