data.table of feature importances in a model.
lgb.importance(model, percentage = TRUE)
object of class
whether to show importance in relative percentage.
For a tree model, a
data.table with the following columns:
Feature Feature names in the model.
Gain The total gain of this feature's splits.
Cover The number of observation related to this feature.
Frequency The number of times a feature splited in trees.
library(lightgbm) data(agaricus.train, package = "lightgbm") train <- agaricus.train dtrain <- lgb.Dataset(train$data, label = train$label) params <- list( objective = "binary" , learning_rate = 0.01 , num_leaves = 63L , max_depth = -1L , min_data_in_leaf = 1L , min_sum_hessian_in_leaf = 1.0 ) model <- lgb.train(params, dtrain, 10L) tree_imp1 <- lgb.importance(model, percentage = TRUE) tree_imp2 <- lgb.importance(model, percentage = FALSE)