---
title: OneHotEncoder.Transformer
framework: createmlcomponents
role: symbol
role_heading: Structure
path: createmlcomponents/onehotencoder/transformer
---

# OneHotEncoder.Transformer

A transformer that encodes a category as an array of integers.

## Declaration

```swift
struct Transformer
```

## Topics

### Creating a transformer

- [init(categories:)](createmlcomponents/onehotencoder/transformer/init(categories:).md)

### Getting the categories

- [categories](createmlcomponents/onehotencoder/transformer/categories.md)
- [category(at:)](createmlcomponents/onehotencoder/transformer/category(at:).md)

### Performing the transformation

- [applied(_:eventHandler:)](createmlcomponents/onehotencoder/transformer/applied(_:eventhandler:).md)
- [applied(to:eventHandler:)](createmlcomponents/onehotencoder/transformer/applied(to:eventhandler:).md)

### Default Implementations

- [Decodable Implementations](createmlcomponents/onehotencoder/transformer/decodable-implementations.md)
- [Encodable Implementations](createmlcomponents/onehotencoder/transformer/encodable-implementations.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Escapable](swift/escapable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [Transformer](createmlcomponents/transformer.md)