字符串排序时不要忽略大小写

问题描述

R 中是否有内置功能可以在考虑大小写的情况下对字符向量进行排序?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"

这是我目前的解决方案:

This is my solution so far:

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

推荐答案

Following 关于 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.我阅读了 Sys.setlocale 的帮助页面，似乎改变 LC_COLLATE 就足够了: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")

要临时更改整理以进行排序，您可以使用 withr 包:

To temporally change collate for sorting you could use withr package:

withr::with_collate("C", sort(tv))

或使用 stringr 包(如@dracodoc 评论):

or use stringr package (as in @dracodoc comment):

stringr::str_sort(tv, locale="C")

我认为这是最好的方法.

I think this is the best way to do it.

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