37 lines
1.1 KiB
R
37 lines
1.1 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{dimnames.xgb.DMatrix}
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\alias{dimnames.xgb.DMatrix}
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\alias{dimnames<-.xgb.DMatrix}
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\title{Handling of column names of \code{xgb.DMatrix}}
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\usage{
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\method{dimnames}{xgb.DMatrix}(x)
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\method{dimnames}{xgb.DMatrix}(x) <- value
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}
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\arguments{
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\item{x}{Object of class \code{xgb.DMatrix}.}
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\item{value}{A list of two elements: the first one is ignored
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and the second one is column names}
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}
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\description{
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Only column names are supported for \code{xgb.DMatrix}, thus setting of
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row names would have no effect and returned row names would be \code{NULL}.
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}
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\details{
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Generic \code{\link[=dimnames]{dimnames()}} methods are used by \code{\link[=colnames]{colnames()}}.
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Since row names are irrelevant, it is recommended to use \code{\link[=colnames]{colnames()}} directly.
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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, nthread = 2)
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dimnames(dtrain)
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colnames(dtrain)
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colnames(dtrain) <- make.names(1:ncol(train$data))
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print(dtrain, verbose = TRUE)
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}
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