getImpExtra {Boruta}

ranger Extra-trees importance adapters

Description

Those function is intended to be given to a getImp argument of Boruta function to be called by the Boruta algorithm as an importance source. getImpExtraZ generates default, normalized permutation importance, getImpExtraRaw raw permutation importance, finally getImpExtraGini generates Gini impurity importance.

Usage

getImpExtraZ(x, y, ntree = 500, num.trees = ntree, ...)

getImpExtraGini(x, y, ntree = 500, num.trees = ntree, ...)

getImpExtraRaw(x, y, ntree = 500, num.trees = ntree, ...)

Arguments

x

data frame of predictors including shadows.

y

response vector.

ntree

Number of trees in the forest; copied into ranger's native num.trees, put to retain transparent compatibility with randomForest.

num.trees

Number of trees in the forest, as according to ranger's nomenclature. If not given, set to ntree value. If both are given, num.trees takes precedence.

...

parameters passed to the underlying ranger call; they are relayed from ... of Boruta. Note that these function work just by setting splitrule to "extratrees".