slice: Slice a dataset

In lightgbm: Light Gradient Boosting Machine

Slice a dataset

Description

Get a new lgb.Dataset containing the specified rows of original lgb.Dataset object

Usage

slice(dataset, ...)

## S3 method for class 'lgb.Dataset'
slice(dataset, idxset, ...)

Arguments

dataset	Object of class lgb.Dataset
...	other parameters (currently not used)
idxset	an integer vector of indices of rows needed

Value

constructed sub dataset

Examples

data(agaricus.train, package = "lightgbm")
train <- agaricus.train
dtrain <- lgb.Dataset(train$data, label = train$label)

dsub <- lightgbm::slice(dtrain, seq_len(42L))
lgb.Dataset.construct(dsub)
labels <- lightgbm::get_field(dsub, "label")

lightgbm documentation built on Jan. 17, 2023, 1:13 a.m.