---
title: "fitted(to:validateOn:eventHandler:)"
framework: createmlcomponents
role: symbol
role_heading: Instance Method
path: "createmlcomponents/updatablesupervisedestimatortotemporaladaptor/fitted(to:validateon:eventhandler:)"
---

# fitted(to:validateOn:eventHandler:)

Fits a transformer to a sequence of examples while validating with a validation sequence.

## Declaration

```swift
func fitted<InputSequence, Validation, FeatureSequence>(to input: InputSequence, validateOn validation: Validation, eventHandler: EventHandler? = nil) async throws -> UpdatableSupervisedEstimatorToTemporalAdaptor<Base>.Transformer where InputSequence : Sequence, Validation : Sequence, FeatureSequence : TemporalSequence, InputSequence.Element == AnnotatedFeature<FeatureSequence, Base.Annotation>, Validation.Element == AnnotatedFeature<FeatureSequence, Base.Annotation>, FeatureSequence.Feature == Base.Transformer.Input
```

## Parameters

- `input`: A sequence of examples used for fitting the transformer.
- `validation`: A sequence of examples used for validating the fitted transformer.
- `eventHandler`: An event handler.

## Return Value

Return Value The fitted transformer.

## See Also

### Fitting and updating

- [fitted(to:eventHandler:)](createmlcomponents/updatablesupervisedestimatortotemporaladaptor/fitted(to:eventhandler:).md)
- [makeTransformer()](createmlcomponents/updatablesupervisedestimatortotemporaladaptor/maketransformer().md)
- [update(_:with:eventHandler:)](createmlcomponents/updatablesupervisedestimatortotemporaladaptor/update(_:with:eventhandler:).md)
- [UpdatableSupervisedEstimatorToTemporalAdaptor.Annotation](createmlcomponents/updatablesupervisedestimatortotemporaladaptor/annotation.md)
- [UpdatableSupervisedEstimatorToTemporalAdaptor.Input](createmlcomponents/updatablesupervisedestimatortotemporaladaptor/input.md)
- [UpdatableSupervisedEstimatorToTemporalAdaptor.Output](createmlcomponents/updatablesupervisedestimatortotemporaladaptor/output.md)
- [UpdatableSupervisedEstimatorToTemporalAdaptor.Transformer](createmlcomponents/updatablesupervisedestimatortotemporaladaptor/transformer.md)