38 lines
953 B
R
38 lines
953 B
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{slice}
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\alias{slice}
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\alias{slice.xgb.DMatrix}
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\alias{[.xgb.DMatrix}
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\title{Get a new DMatrix containing the specified rows of
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original xgb.DMatrix object}
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\usage{
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slice(object, idxset)
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\method{slice}{xgb.DMatrix}(object, idxset)
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\method{[}{xgb.DMatrix}(object, idxset, colset = NULL)
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}
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\arguments{
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\item{object}{Object of class "xgb.DMatrix"}
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\item{idxset}{a integer vector of indices of rows needed}
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\item{colset}{currently not used (columns subsetting is not available)}
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}
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\description{
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Get a new DMatrix containing the specified rows of
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original xgb.DMatrix object
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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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dsub <- slice(dtrain, 1:42)
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labels1 <- getinfo(dsub, 'label')
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dsub <- dtrain[1:42, ]
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labels2 <- getinfo(dsub, 'label')
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all.equal(labels1, labels2)
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}
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