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# preprocessed(from:eventHandler:)

Preprocesses a sequence of examples.

```
func preprocessed<InputSequence, FeatureSequence>(from input: InputSequence, eventHandler: EventHandler? = nil) async throws -> [AnnotatedFeature<PreprocessedFeatureSequence<Preprocessor.Output>, PreprocessingSupervisedTemporalEstimator<Preprocessor, Estimator>.Annotation>] where InputSequence : Sequence, FeatureSequence : TemporalSequence, Preprocessor.Input == FeatureSequence.Feature, InputSequence.Element == AnnotatedFeature<FeatureSequence, Estimator.Annotation>
```

## Parameters

`input`

A sequence of examples.

`eventHandler`

An event handler.

## Return Value

The preprocessed examples.

---

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