xgboost (version 0.4-3)

getinfo: Get information of an xgb.DMatrix object

Description

Get information of an xgb.DMatrix object

Usage

getinfo(object, ...)
## S3 method for class 'xgb.DMatrix':
getinfo(object, name)

Arguments

object

Object of class xgb.DMatrix

...

other parameters

name

the name of the field to get

Details

The information can be one of the following:

• label: label Xgboost learn from ;
• weight: to do a weight rescale ;
• base_margin: base margin is the base prediction Xgboost will boost from ;
• nrow: number of rows of thexgb.DMatrix.

Examples

data(agaricus.train, package='xgboost')
train <- agaricus.train
dtrain <- xgb.DMatrix(train$data, label=train$label)
labels <- getinfo(dtrain, 'label')
setinfo(dtrain, 'label', 1-labels)
labels2 <- getinfo(dtrain, 'label')
stopifnot(all(labels2 == 1-labels))