improvement for reducing warnings

R-package/R/xgboost.R

@@ -33,9 +33,14 @@
 #' Number of threads can also be manually specified via "nthread" parameter
 #' 
 #' @examples
-#' data(iris)
-#' bst <- xgboost(as.matrix(iris[,1:4]),as.numeric(iris[,5]=='setosa'), nrounds = 2)
-#' pred <- predict(bst, as.matrix(iris[,1:4]))
+#' data(agaricus.train, package='xgboost')
+#' data(agaricus.test, package='xgboost')
+#' train <- agaricus.train
+#' test <- agaricus.test
+#' bst <- xgboost(data = train$data, label = train$label, max.depth = 2, 
+#'                eta = 1, nround = 2,objective = "binary:logistic")
+#' pred <- predict(bst, test$data)
+#' 
 #' @export
 #' 
 xgboost <- function(data = NULL, label = NULL, params = list(), nrounds,