setinfo

From xgboost v0.4-2 by Tong He

Set information of an xgb.DMatrix object

Usage

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

Arguments

object: Object of class "xgb.DMatrix"
...: other parameters
name: the name of the field to get
info: the specific field of information to set

Details

It 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 ;
group.

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))

Documentation reproduced from package xgboost, version 0.4-2, License: Apache License (== 2.0) | file LICENSE

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