improve document format

R-package/R/getinfo.xgb.DMatrix.R

@@ -4,20 +4,23 @@ setClass('xgb.DMatrix')
 #' 
 #' Get information of an xgb.DMatrix object
 #' 
-#' @param object Object of class "xgb.DMatrix"
-#' @param name the name of the field to get
-#' 
 #' @examples
 #' data(iris)
 #' iris[,5] <- as.numeric(iris[,5])
 #' dtrain <- xgb.DMatrix(as.matrix(iris[,1:4]), label=iris[,5])
 #' labels <- getinfo(dtrain, "label")
+#' @rdname getinfo
 #' @export
 #' 
 getinfo <- function(object, ...){
     UseMethod("getinfo")
 }
 
+#' @param object Object of class "xgb.DMatrix"
+#' @param name the name of the field to get
+#' @param ... other parameters
+#' @rdname getinfo
+#' @method getinfo xgb.DMatrix
 setMethod("getinfo", signature = "xgb.DMatrix", 
           definition = function(object, name) {
               if (typeof(name) != "character") {

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

@@ -6,22 +6,25 @@ setClass('xgb.DMatrix')
 #' Get a new DMatrix containing the specified rows of
 #' orginal xgb.DMatrix object
 #' 
-#' @param object Object of class "xgb.DMatrix"
-#' @param idxset a integer vector of indices of rows needed
-#' 
 #' @examples
 #' data(iris)
 #' iris[,5] <- as.numeric(iris[,5])
 #' dtrain <- xgb.DMatrix(as.matrix(iris[,1:4]), label=iris[,5])
 #' dsub <- slice(dtrain, 1:3)
+#' @rdname slice
 #' @export
 #' 
 slice <- function(object, ...){
     UseMethod("slice")
 }
 
+#' @param object Object of class "xgb.DMatrix"
+#' @param idxset a integer vector of indices of rows needed
+#' @param ... other parameters
+#' @rdname slice
+#' @method slice xgb.DMatrix
 setMethod("slice", signature = "xgb.DMatrix", 
-          definition = function(object, idxset) {
+          definition = function(object, idxset, ...) {
               if (class(object) != "xgb.DMatrix") {
                   stop("slice: first argument dtrain must be xgb.DMatrix")
               }

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

@@ -2,7 +2,7 @@
 #' 
 #' Save xgb.DMatrix object to binary file
 #' 
-#' @param model the model object.
+#' @param DMatrix the model object.
 #' @param fname the name of the binary file.
 #' 
 #' @examples