Last data update: 2014.03.03
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R: Get information of an xgb.DMatrix object
Get information of an xgb.DMatrix object
Description
Get information of an xgb.DMatrix object
Usage
getinfo(object, ...)
## S4 method for signature 'xgb.DMatrix'
getinfo(object, name)
Arguments
object |
Object of class xgb.DMatrix
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... |
other parameters
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name |
the name of the field to get
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Details
The information can be one of the following:
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label : label Xgboost learn from ;
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weight : to do a weight rescale ;
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base_margin : base margin is the base prediction Xgboost will boost from ;
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nrow : number of rows of the xgb.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))
Results
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