---
title: stepSize
framework: createml
role: symbol
role_heading: Instance Property
path: createml/mlboostedtreeregressor/modelparameters-swift.struct/stepsize
---

# stepSize

Must be in the range (0, 1).

## Declaration

```swift
var stepSize: Double
```

## See Also

### Accessing parameters

- [columnSubsample](createml/mlboostedtreeregressor/modelparameters-swift.struct/columnsubsample.md)
- [earlyStoppingRounds](createml/mlboostedtreeregressor/modelparameters-swift.struct/earlystoppingrounds.md)
- [maxDepth](createml/mlboostedtreeregressor/modelparameters-swift.struct/maxdepth.md)
- [maxIterations](createml/mlboostedtreeregressor/modelparameters-swift.struct/maxiterations.md)
- [minChildWeight](createml/mlboostedtreeregressor/modelparameters-swift.struct/minchildweight.md)
- [minLossReduction](createml/mlboostedtreeregressor/modelparameters-swift.struct/minlossreduction.md)
- [randomSeed](createml/mlboostedtreeregressor/modelparameters-swift.struct/randomseed.md)
- [rowSubsample](createml/mlboostedtreeregressor/modelparameters-swift.struct/rowsubsample.md)
- [validationData](createml/mlboostedtreeregressor/modelparameters-swift.struct/validationdata-swift.property.md)
- [validation](createml/mlboostedtreeregressor/modelparameters-swift.struct/validation.md)