addSurrogates: Add surrogate information that was created by getTreeranger

In StephanSeifert/SurrogateMinimalDepth: Surrogate minimal depth variable importance

Add surrogate information that was created by getTreeranger

Description

This function adds surrogate variables and adjusted agreement values to a forest that was created by getTreeranger.

Usage

addSurrogates(RF, trees, s, Xdata, num.threads)

Arguments

RF	random forest object created by ranger (with keep.inbag=TRUE).
trees	list of trees created by getTreeranger.
s	Predefined number of surrogate splits (it may happen that the actual number of surrogate splits differes in individual nodes). Default is 1 % of no. of variables.
Xdata	data without the dependent variable.
num.threads	number of threads used for parallel execution. Default is number of CPUs available.

Value

a list with trees containing of lists of nodes with the elements:

• nodeID: ID of the respective node (important for left and right daughters in the next columns)

• leftdaughter: ID of the left daughter of this node

• rightdaughter: ID of the right daughter of this node

• splitvariable: ID of the split variable

• splitpoint: splitpoint of the split variable

• status: "0" for terminal and "1" for non-terminal

• layer: layer information (0 means root node, 1 means 1 layer below root, etc)

• surrogate_i: numbered surrogate variables (number depending on s)

• adj_i: adjusted agreement of variable i

StephanSeifert/SurrogateMinimalDepth documentation built on Aug. 7, 2023, 1:59 a.m.