R 解包后粘贴（）省略号赢得'；不打印列出的参数

我创建了函数

mad_libs

，其中一个函数传递一个省略号作为参数并将其解包。函数“起作用”，因为它确实在打印，显然没有什么问题，但我没有得到我传递的参数

功能如下：

   mad_libs <- function(...){
            args <- list(...)

            place <- args[["place"]]
            adjective <- args[["adjective"]]
            noun <- args[["noun"]]

            paste("News from", place, "today where", adjective, "students took 
to the streets in protest of the new", noun, "being installed on campus.")
    }

参数没有打印出来

我有打印问题，因为我的操作系统是Br葡萄牙语，但这似乎不是拼写规则会有问题的情况

用巴西葡萄牙语在RStudio和Windows10上运行R3.3.1。

您可能应该学习

如果希望位置匹配和名称匹配都起作用，可以使用

do.call

，如下所示：

mad_libs <- function(...){
  args <- list(...)

  fun <- function(place, adjective, noun)
    paste("News from", place, "today where", adjective, "students took to the streets in protest of the new", noun, "being installed on campus.")

  do.call(fun, args)
}

mad_libs("NIFLHEIM", "possessed", "fountain")
#[1] "News from NIFLHEIM today where possessed students took to the streets in protest of the new fountain being installed on campus."

mad_libs(adjective = "possessed", "NIFLHEIM", "fountain")
#[1] "News from NIFLHEIM today where possessed students took to the streets in protest of the new fountain being installed on campus."

你应该好好学习

如果希望位置匹配和名称匹配都起作用，可以使用

do.call

，如下所示：

mad_libs <- function(...){
  args <- list(...)

  fun <- function(place, adjective, noun)
    paste("News from", place, "today where", adjective, "students took to the streets in protest of the new", noun, "being installed on campus.")

  do.call(fun, args)
}

mad_libs("NIFLHEIM", "possessed", "fountain")
#[1] "News from NIFLHEIM today where possessed students took to the streets in protest of the new fountain being installed on campus."

mad_libs(adjective = "possessed", "NIFLHEIM", "fountain")
#[1] "News from NIFLHEIM today where possessed students took to the streets in protest of the new fountain being installed on campus."

---

这对我来说很好。我试过mad_libs（place=“the moon”，形容词=“hyperactive”，名词=“SAS数据服务器”）。您是否指定了传递给

mad_libs

的参数？不，我没有。我只尝试了位置匹配。命名参数确实有效，但我不明白为什么不这样做。它对我来说很好。我试过mad_libs（place=“the moon”，形容词=“hyperactive”，名词=“SAS数据服务器”）。您是否指定了传递给

mad_libs

的参数？不，我没有。我只尝试了位置匹配。它确实可以命名参数，但我不明白为什么它不能以其他方式命名。正如您所提到的，我正在研究参数匹配，并且还解包了省略号。你的解决方案看起来比我尝试的更有趣，也更经济。谢谢你的帮助！正如你提到的，我在研究参数匹配，也在研究省略号的解包。你的解决方案看起来比我尝试的更有趣，也更经济。谢谢你的帮助！

mad_libs <- function(...){

  fun <- function(place, adjective, noun)
    paste("News from", place, "today where", adjective, "students took to the streets in protest of the new", noun, "being installed on campus.")

  fun(...)
}