xgboost (version 0.4-1)

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"
...
other parameters
idxset
a integer vector of indices of rows needed

Examples

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

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