---
title: "MLSplitStrategy.fixed(ratio:seed:)"
framework: createml
role: symbol
role_heading: Case
path: "createml/mlsplitstrategy/fixed(ratio:seed:)"
---

# MLSplitStrategy.fixed(ratio:seed:)

Create ML uses a portion of your training dataset to create a validation dataset based on the ratio.

## Declaration

```swift
case fixed(ratio: Double, seed: Int?)
```

## Discussion

Discussion The ratio is a value in the range [0.0, 1.0] that determines how much of the training data to use for validation. The seed value can be used to get consistent results across invocations. If seed is nil the split will be randomized on every invocation.

## See Also

### Partitioning data

- [MLSplitStrategy.automatic](createml/mlsplitstrategy/automatic.md)
- [resolve(count:)](createml/mlsplitstrategy/resolve(count:).md)