replace iris in docs

R-package/man/xgb.dump.Rd

@@ -20,8 +20,12 @@ xgb.dump(model, fname, fmap = "")
 Save a xgboost model to text file. Could be parsed later.
 }
 \examples{
-data(iris)
-bst <- xgboost(as.matrix(iris[,1:4]),as.numeric(iris[,5]=='setosa'), nrounds = 2)
-xgb.dump(bst, 'iris.xgb.model.dump')
+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")
+xgb.dump(bst, 'xgb.model.dump')
 }