RegressionTreeBase.LeftChild Property

Definition

Namespace:

Microsoft.ML.Trainers.FastTree

Assembly:

Microsoft.ML.FastTree.dll

Package:

Microsoft.ML.FastTree v3.0.1

LeftChild[i] is the i-th node's child index used when (1) the numerical feature indexed by NumericalSplitFeatureIndexes[i] is less than or equal to the threshold NumericalSplitThresholds[i], or (2) the categorical features indexed by GetCategoricalCategoricalSplitFeatureRangeAt(Int32)'s returned value with nodeIndex=i is NOT a sub-set of GetCategoricalSplitFeaturesAt(Int32) with nodeIndex=i. Note that the case (1) happens only when CategoricalSplitFlags[i] is false and otherwise (2) occurs. A non-negative returned value means a node (i.e., not a leaf); for example, 2 means the 3rd node in the underlying Microsoft.ML.Trainers.FastTree.RegressionTreeBase._tree. A negative returned value means a leaf; for example, -1 stands for the ~(-1)-th leaf in the underlying Microsoft.ML.Trainers.FastTree.RegressionTreeBase._tree. Note that ~ is the bitwise complement operator in C#; for details, see https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/operators/bitwise-complement-operator.

public System.Collections.Generic.IReadOnlyList<int> LeftChild { get; }

member this.LeftChild : System.Collections.Generic.IReadOnlyList<int>

Public ReadOnly Property LeftChild As IReadOnlyList(Of Integer)

Property Value

IReadOnlyList<Int32>