42 lines
1004 B
R
42 lines
1004 B
R
% Generated by roxygen2: do not edit by hand
|
|
% Please edit documentation in R/xgb.DMatrix.R
|
|
\name{slice}
|
|
\alias{[.xgb.DMatrix}
|
|
\alias{slice}
|
|
\alias{slice.xgb.DMatrix}
|
|
\title{Get a new DMatrix containing the specified rows of
|
|
orginal xgb.DMatrix object}
|
|
\usage{
|
|
slice(object, ...)
|
|
|
|
\method{slice}{xgb.DMatrix}(object, idxset, ...)
|
|
|
|
\method{[}{xgb.DMatrix}(object, idxset, colset = NULL)
|
|
}
|
|
\arguments{
|
|
\item{object}{Object of class "xgb.DMatrix"}
|
|
|
|
\item{...}{other parameters (currently not used)}
|
|
|
|
\item{idxset}{a integer vector of indices of rows needed}
|
|
|
|
\item{colset}{currently not used (columns subsetting is not available)}
|
|
}
|
|
\description{
|
|
Get a new DMatrix containing the specified rows of
|
|
orginal xgb.DMatrix object
|
|
}
|
|
\examples{
|
|
data(agaricus.train, package='xgboost')
|
|
train <- agaricus.train
|
|
dtrain <- xgb.DMatrix(train$data, label=train$label)
|
|
|
|
dsub <- slice(dtrain, 1:42)
|
|
labels1 <- getinfo(dsub, 'label')
|
|
dsub <- dtrain[1:42, ]
|
|
labels2 <- getinfo(dsub, 'label')
|
|
all.equal(labels1, labels2)
|
|
|
|
}
|
|
|