lightgbm (version 3.3.2)

dimnames.lgb.Dataset: Handling of column names of lgb.Dataset

Description

Only column names are supported for lgb.Dataset, thus setting of row names would have no effect and returned row names would be NULL.

Usage

# S3 method for lgb.Dataset
dimnames(x)
# S3 method for lgb.Dataset
dimnames(x) <- value

Value

A list with the dimension names of the dataset

Arguments

x

object of class lgb.Dataset

value

a list of two elements: the first one is ignored and the second one is column names

Details

Generic dimnames methods are used by colnames. Since row names are irrelevant, it is recommended to use colnames directly.

Examples

# \donttest{
data(agaricus.train, package = "lightgbm")
train <- agaricus.train
dtrain <- lgb.Dataset(train$data, label = train$label)
lgb.Dataset.construct(dtrain)
dimnames(dtrain)
colnames(dtrain)
colnames(dtrain) <- make.names(seq_len(ncol(train$data)))
print(dtrain, verbose = TRUE)
# }