43 lines
1.1 KiB
R
43 lines
1.1 KiB
R
% Generated by roxygen2 (4.1.1): do not edit by hand
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% Please edit documentation in R/getinfo.xgb.DMatrix.R
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\docType{methods}
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\name{getinfo}
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\alias{getinfo}
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\alias{getinfo,xgb.DMatrix-method}
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\title{Get information of an xgb.DMatrix object}
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\usage{
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getinfo(object, ...)
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\S4method{getinfo}{xgb.DMatrix}(object, name)
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}
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\arguments{
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\item{object}{Object of class \code{xgb.DMatrix}}
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\item{...}{other parameters}
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\item{name}{the name of the field to get}
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}
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\description{
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Get information of an xgb.DMatrix object
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}
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\details{
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The information can be one of the following:
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\itemize{
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\item \code{label}: label Xgboost learn from ;
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\item \code{weight}: to do a weight rescale ;
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\item \code{base_margin}: base margin is the base prediction Xgboost will boost from ;
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\item \code{nrow}: number of rows of the \code{xgb.DMatrix}.
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}
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}
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\examples{
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data(agaricus.train, package='xgboost')
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train <- agaricus.train
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dtrain <- xgb.DMatrix(train$data, label=train$label)
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labels <- getinfo(dtrain, 'label')
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setinfo(dtrain, 'label', 1-labels)
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labels2 <- getinfo(dtrain, 'label')
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stopifnot(all(labels2 == 1-labels))
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}
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