lightgbm: dimnames.lgb.Dataset – R documentation

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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 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.

Value

A list with the dimension names of the dataset

Examples

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)

lightgbm

Light Gradient Boosting Machine

v3.2.1

MIT + file LICENSE

Authors

Guolin Ke [aut, cre], Damien Soukhavong [aut], James Lamb [aut], Qi Meng [aut], Thomas Finley [aut], Taifeng Wang [aut], Wei Chen [aut], Weidong Ma [aut], Qiwei Ye [aut], Tie-Yan Liu [aut], Yachen Yan [ctb], Microsoft Corporation [cph], Dropbox, Inc. [cph], Jay Loden [cph], Dave Daeschler [cph], Giampaolo Rodola [cph], Alberto Ferreira [ctb], Daniel Lemire [ctb], Victor Zverovich [cph], IBM Corporation [ctb]

Initial release

2021-04-12