xgboost (version 0.3-1)

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, ...)
## S3 method for class 'xgb.DMatrix':
slice(object, idxset, ...)

Arguments

object

Object of class "xgb.DMatrix"

idxset

a integer vector of indices of rows needed

...

other parameters

Examples

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