在排序字符串时不要忽略大小写 [英] Do not ignore case in sorting character strings

问题描述

在R中有一个内置函数来排序字符向量考虑案例？ sort 和 order 忽略大小写：

Is there a builtin functionality in R to sort character vectors taking case into account? sort and order ignore the case:

tv <- c("a", "A", "ab", "B")
sort(tv)
## [1] "a"  "A"  "ab" "B" 

这是我的解决方案：

CAPS <- grep("^[A-Z]", tv)
c(sort(tv[CAPS]), sort(tv[-CAPS]))
## [1] "A"  "B"  "a"  "ab"

推荐答案

关注关于在Notepad ++中自动完成的帖子您可以更改本地设置：

Following post about Auto-completion in Notepad++ you could change local settings:

Sys.setlocale(, "C")
sort(tv)
# [1] "A"  "B"  "a"  "ab"

---

编辑。我阅读帮助页面 Sys.setlocale ，似乎更改 LC_COLLATE 是足够的： Sys .setlocale（LC_COLLATE，C）

---

EDIT. I read help pages to Sys.setlocale and it seems that changing LC_COLLATE is sufficient: Sys.setlocale("LC_COLLATE", "C")

如果你多次使用它， p>

You could wrap it into a function if you use it more than once:

sortC <- function(...) {
    a <- Sys.getlocale("LC_COLLATE")
    on.exit(Sys.setlocale("LC_COLLATE", a))
    Sys.setlocale("LC_COLLATE", "C")
    sort(...)
}

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