fix some warning in Cran check

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

@@ -0,0 +1,27 @@
+% Generated by roxygen2 (4.1.0): do not edit by hand
+% Please edit documentation in R/xgb.save.raw.R
+\name{xgb.save.raw}
+\alias{xgb.save.raw}
+\title{Save xgboost model to R's raw vector,
+user can call xgb.load to load the model back from raw vector}
+\usage{
+xgb.save.raw(model)
+}
+\arguments{
+\item{model}{the model object.}
+}
+\description{
+Save xgboost model from xgboost or xgb.train
+}
+\examples{
+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")
+raw <- xgb.save(bst)
+bst <- xgb.load(raw)
+pred <- predict(bst, test$data)
+}
+