获取 lgb.Dataset
的一个属性
get_field(dataset, field_name)
# S3 method for class 'lgb.Dataset'
get_field(dataset, field_name)
请求的属性
# \donttest{
data(agaricus.train, package = "lightgbm")
train <- agaricus.train
dtrain <- lgb.Dataset(train$data, label = train$label)
lgb.Dataset.construct(dtrain)
labels <- lightgbm::get_field(dtrain, "label")
lightgbm::set_field(dtrain, "label", 1 - labels)
labels2 <- lightgbm::get_field(dtrain, "label")
stopifnot(all(labels2 == 1 - labels))
# }