[R] Clearer function signatures for S3 methods (#9937)

R-package/man/getinfo.Rd

@@ -5,15 +5,13 @@
 \alias{getinfo.xgb.DMatrix}
 \title{Get information of an xgb.DMatrix object}
 \usage{
-getinfo(object, ...)
+getinfo(object, name)
 
-\method{getinfo}{xgb.DMatrix}(object, name, ...)
+\method{getinfo}{xgb.DMatrix}(object, name)
 }
 \arguments{
 \item{object}{Object of class \code{xgb.DMatrix}}
 
-\item{...}{other parameters}
-
 \item{name}{the name of the information field to get (see details)}
 }
 \description{

R-package/man/setinfo.Rd

@@ -5,15 +5,13 @@
 \alias{setinfo.xgb.DMatrix}
 \title{Set information of an xgb.DMatrix object}
 \usage{
-setinfo(object, ...)
+setinfo(object, name, info)
 
-\method{setinfo}{xgb.DMatrix}(object, name, info, ...)
+\method{setinfo}{xgb.DMatrix}(object, name, info)
 }
 \arguments{
 \item{object}{Object of class "xgb.DMatrix"}
 
-\item{...}{Not used.}
-
 \item{name}{the name of the field to get}
 
 \item{info}{the specific field of information to set}

R-package/man/slice.xgb.DMatrix.Rd

@@ -7,17 +7,15 @@
 \title{Get a new DMatrix containing the specified rows of
 original xgb.DMatrix object}
 \usage{
-slice(object, ...)
+slice(object, idxset)
 
-\method{slice}{xgb.DMatrix}(object, idxset, ...)
+\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)}