r - 如何在 R 的 setwd() 命令上换行？

Question

我尝试将所有 R 脚本行保持在 80 个字符以下。每当涉及字符串时，这都会被证明是一个挑战，但通常只是在不使用任何特殊字符的情况下换行，如下所示:

plot(x, y, main = "some reeeealy long title, so long that
                   I need to break it into several lines
                   in order to satisfy my ****-retentive
                   self.")

但是，一些功能如 setwd()只是不会让我这样做。例如，运行

setwd("/folder/another folder/yet another folder/
      what are you doing, hiding pr0n?/I think I've made my point/")

返回以下错误:

Error in setwd("/folder/another folder/yet another folder/\n
      what are you doing, hiding pr0n?/I think I've made my point/") : 
cannot change working directory

我试过在斜线字符以外的不同点上刹车线，但我无法让它工作。我能找到的唯一解决方法是运行

setwd(paste("/folder/another folder/yet another folder/",
            "what are you doing, hiding pr0n?/I think I've made my point/",
            sep = "")

哪个有效，但似乎只是为了尊重一些自定义规则而一团糟。

有没有更优雅的方法来实现这一目标？

Answer 1

一般来说，paste然而，在这种特殊情况下，这是我能想到的唯一方法，file.path是比paste更好的选择因为它会自动为您的平台提供正确的分隔符。

file.path("/folder", "another folder", "yet another folder",
            "what are you doing, hiding pr0n?",
            "I think I've made my point")