49 lines
1.2 KiB
R
49 lines
1.2 KiB
R
% Generated by roxygen2: do not edit by hand
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% Please edit documentation in R/xgb.DMatrix.R
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\name{getinfo}
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\alias{getinfo}
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\alias{getinfo.xgb.DMatrix}
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\title{Get information of an xgb.DMatrix object}
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\usage{
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getinfo(object, name)
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\method{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{name}{the name of the information field to get (see details)}
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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 \code{name} field can be one of the following:
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\itemize{
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\item \code{label}
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\item \code{weight}
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\item \code{base_margin}
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\item \code{label_lower_bound}
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\item \code{label_upper_bound}
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\item \code{group}
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\item \code{feature_type}
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\item \code{feature_name}
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\item \code{nrow}
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}
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See the documentation for \link{xgb.DMatrix} for more information about these fields.
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Note that, while 'qid' cannot be retrieved, it's possible to get the equivalent 'group'
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for a DMatrix that had 'qid' assigned.
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}
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\examples{
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data(agaricus.train, package='xgboost')
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dtrain <- with(agaricus.train, xgb.DMatrix(data, label = label, nthread = 2))
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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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