---
title: "init(validation:maxDepth:maxIterations:minLossReduction:minChildWeight:randomSeed:stepSize:earlyStoppingRounds:rowSubsample:columnSubsample:)"
framework: createml
role: symbol
role_heading: Initializer
path: "createml/mlboostedtreeregressor/modelparameters-swift.struct/init(validation:maxdepth:maxiterations:minlossreduction:minchildweight:randomseed:stepsize:earlystoppingrounds:rowsubsample:columnsubsample:)"
---

# init(validation:maxDepth:maxIterations:minLossReduction:minChildWeight:randomSeed:stepSize:earlyStoppingRounds:rowSubsample:columnSubsample:)

## Declaration

```swift
init(validation: MLBoostedTreeRegressor.ModelParameters.ValidationData, maxDepth: Int = 6, maxIterations: Int = 10, minLossReduction: Double = 0, minChildWeight: Double = 0.1, randomSeed: Int = 42, stepSize: Double = 0.3, earlyStoppingRounds: Int? = nil, rowSubsample: Double = 1.0, columnSubsample: Double = 1.0)
```

## See Also

### Creating parameters

- [init(validationData:maxDepth:maxIterations:minLossReduction:minChildWeight:randomSeed:stepSize:earlyStoppingRounds:rowSubsample:columnSubsample:)](createml/mlboostedtreeregressor/modelparameters-swift.struct/init(validationdata:maxdepth:maxiterations:minlossreduction:minchildweight:randomseed:stepsize:earlystoppingrounds:rowsubsample:columnsubsample:).md)
- [MLBoostedTreeRegressor.ModelParameters.ValidationData](createml/mlboostedtreeregressor/modelparameters-swift.struct/validationdata-swift.enum.md)