How to Make Packages in R

library(devtools)

library(roxygen2)

setwd("/Users/baek0508/Documents/2018 Big DATA/project/makepackages/")
getwd()
create("helloworld")

test=function(x){
  y=x+1
  return(y)
}

#' test # 함수이름
#' 
#' This is test function # 함수설명
#' @param x vector. This is argument
#' @return Summed Num
#' @export 
#' @examples
#' test(3)

setwd("./makepackages/helloworld/")
document()

setwd("./makepackages/")
getwd()

install("helloworld")