R: Construct lgb.Dataset object

lgb.Dataset {lightgbm}

R Documentation

Construct lgb.Dataset object

Description

Construct lgb.Dataset object from dense matrix, sparse matrix or local file (that was created previously by saving an lgb.Dataset).

Usage

lgb.Dataset(data, params = list(), reference = NULL, colnames = NULL,
  categorical_feature = NULL, free_raw_data = TRUE, info = list(), ...)

Arguments

`data`	a `matrix` object, a `dgCMatrix` object or a character representing a filename
`params`	a list of parameters
`reference`	reference dataset
`colnames`	names of columns
`categorical_feature`	categorical features
`free_raw_data`	TRUE for need to free raw data after construct
`info`	a list of information of the lgb.Dataset object
`...`	other information to pass to `info` or parameters pass to `params`

Value

constructed dataset

Examples

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

[Package lightgbm version 2.2.2 Index]