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

the dataset you passed in

Examples

# \donttest{ 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) # }