add slice document

R-package/man/slice.Rd

@@ -0,0 +1,24 @@
+% Generated by roxygen2 (4.0.1): do not edit by hand
+\name{slice}
+\alias{slice}
+\title{Get a new DMatrix containing the specified rows of
+orginal xgb.DMatrix object}
+\usage{
+slice(object, ...)
+}
+\arguments{
+\item{object}{Object of class "xgb.DMatrix"}
+
+\item{idxset}{a integer vector of indices of rows needed}
+}
+\description{
+Get a new DMatrix containing the specified rows of
+orginal xgb.DMatrix object
+}
+\examples{
+data(iris)
+iris[,5] <- as.numeric(iris[,5])
+dtrain <- xgb.DMatrix(as.matrix(iris[,1:4]), label=iris[,5])
+dsub <- slice(dtrain, c(1,2,3))
+}
+