getinfo

From xgboost v0.82.1 by Tong He

Get information of an xgb.DMatrix object

Usage

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

Arguments

object: Object of class xgb.DMatrix
...: other parameters
name: the name of the information field to get (see details)

Details

The name field 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 the xgb.DMatrix.

group can be setup by setinfo but can't be retrieved by getinfo.

Examples

# NOT RUN {
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))
# }

Documentation reproduced from package xgboost, version 0.82.1, License: Apache License (== 2.0) | file LICENSE

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