improve document format

R-package/man/getinfo.Rd

@@ -1,14 +1,20 @@
 % Generated by roxygen2 (4.0.1): do not edit by hand
+\docType{methods}
 \name{getinfo}
 \alias{getinfo}
+\alias{getinfo,xgb.DMatrix-method}
 \title{Get information of an xgb.DMatrix object}
 \usage{
 getinfo(object, ...)
+
+\S4method{getinfo}{xgb.DMatrix}(object, name)
 }
 \arguments{
 \item{object}{Object of class "xgb.DMatrix"}
 
 \item{name}{the name of the field to get}
+
+\item{...}{other parameters}
 }
 \description{
 Get information of an xgb.DMatrix object

R-package/man/slice.Rd

@@ -1,15 +1,21 @@
 % Generated by roxygen2 (4.0.1): do not edit by hand
+\docType{methods}
 \name{slice}
 \alias{slice}
+\alias{slice,xgb.DMatrix-method}
 \title{Get a new DMatrix containing the specified rows of
 orginal xgb.DMatrix object}
 \usage{
 slice(object, ...)
+
+\S4method{slice}{xgb.DMatrix}(object, idxset, ...)
 }
 \arguments{
 \item{object}{Object of class "xgb.DMatrix"}
 
 \item{idxset}{a integer vector of indices of rows needed}
+
+\item{...}{other parameters}
 }
 \description{
 Get a new DMatrix containing the specified rows of

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

@@ -6,7 +6,7 @@
 xgb.DMatrix.save(DMatrix, fname)
 }
 \arguments{
-\item{model}{the model object.}
+\item{DMatrix}{the model object.}
 
 \item{fname}{the name of the binary file.}
 }