R: Handling of column names of 'lgb.Dataset'

dimnames.lgb.Dataset {lightgbm}

R Documentation

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 class 'lgb.Dataset'
dimnames(x)

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

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

library(lightgbm)
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(1:ncol(train$data))
print(dtrain, verbose = TRUE)