getVI-forestry: getVI-forestry

In Rforestry: Random Forests, Linear Trees, and Gradient Boosting for Inference and Interpretability

getVI-forestry

Description

Calculate the percentage increase in OOB error of the forest when each feature is shuffled.

Usage

getVI(object, noWarning, metric = "mse", seed = 1)

Arguments

object	A 'forestry' object.
noWarning	flag to not display warnings
metric	A parameter to determine how the predictions of the forest with a permuted variable are compared to the predictions of the standard forest. Must be one of c("mse","auc","tnr"), "mse" gives the percentage increase in mse when the feature is permuted, "auc" gives the percentage decrease in AUC when the feature is permuted, and "tnr" gives the percentage decrease in TNR when the TPR is 99% when the feature is permuted.
seed	A parameter to seed the random number generator for shuffling the features of X.

Value

The variable importance of the forest.

Note

Pass a seed to this function so it is possible to replicate the vector permutations used when measuring feature importance.

Rforestry documentation built on March 31, 2023, 11:33 p.m.