---
title: MLRecommender.SimilarityType
framework: createml
role: symbol
role_heading: Enumeration
path: createml/mlrecommender/similaritytype
---

# MLRecommender.SimilarityType

The metric by which the recommender computes item similarity.

## Declaration

```swift
enum SimilarityType
```

## Topics

### Similarity types

- [MLRecommender.SimilarityType.jaccard](createml/mlrecommender/similaritytype/jaccard.md)
- [MLRecommender.SimilarityType.cosine](createml/mlrecommender/similaritytype/cosine.md)
- [MLRecommender.SimilarityType.pearson](createml/mlrecommender/similaritytype/pearson.md)

### Similarity type descriptions

- [description](createml/mlrecommender/similaritytype/description.md)
- [debugDescription](createml/mlrecommender/similaritytype/debugdescription.md)
- [playgroundDescription](createml/mlrecommender/similaritytype/playgrounddescription.md)

### Default Implementations

- [CustomDebugStringConvertible Implementations](createml/mlrecommender/similaritytype/customdebugstringconvertible-implementations.md)
- [CustomPlaygroundDisplayConvertible Implementations](createml/mlrecommender/similaritytype/customplaygrounddisplayconvertible-implementations.md)
- [CustomStringConvertible Implementations](createml/mlrecommender/similaritytype/customstringconvertible-implementations.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomPlaygroundDisplayConvertible](swift/customplaygrounddisplayconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Supporting types

- [MLRecommender.ModelAlgorithmType](createml/mlrecommender/modelalgorithmtype.md)