---
title: "fitted(to:validateOn:eventHandler:)"
framework: createmlcomponents
role: symbol
role_heading: Instance Method
path: "createmlcomponents/temporalestimatortosupervisedadaptor/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 -> TemporalEstimatorToSupervisedAdaptor<Estimator, Annotation>.Transformer where InputSequence : Sequence, Validation : Sequence, FeatureSequence : TemporalSequence, InputSequence.Element == AnnotatedFeature<FeatureSequence, Annotation>, Validation.Element == AnnotatedFeature<FeatureSequence, Annotation>, FeatureSequence.Feature == Estimator.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

- [fitted(to:eventHandler:)](createmlcomponents/temporalestimatortosupervisedadaptor/fitted(to:eventhandler:).md)
- [Transformer](createmlcomponents/transformer.md)