Set reference of lgb.Dataset

If you want to use validation data, you should set reference to training data

lgb.Dataset.set.reference(dataset, reference)

Arguments

dataset	object of class lgb.Dataset
reference	object of class lgb.Dataset

Value

passed dataset

Examples

library(lightgbm)
data(agaricus.train, package ="lightgbm")
train <- agaricus.train
dtrain <- lgb.Dataset(train$data, label = train$label)
data(agaricus.test, package = "lightgbm")
test <- agaricus.test
dtest <- lgb.Dataset(test$data, test = train$label)
lgb.Dataset.set.reference(dtest, dtrain)