xgboost (version 0.4-4)

slice: Get a new DMatrix containing the specified rows of orginal xgb.DMatrix object

Description

Get a new DMatrix containing the specified rows of orginal xgb.DMatrix object

Usage

slice(object, ...)
"slice"(object, idxset, ...)

Arguments

object

Object of class "xgb.DMatrix"

...

other parameters

idxset

a integer vector of indices of rows needed

Examples

data(agaricus.train, package='xgboost')
train <- agaricus.train
dtrain <- xgb.DMatrix(train$data, label=train$label)
dsub <- slice(dtrain, 1:3)