否定R中的％in％ [英] Negation of %in% in R

问题描述

R中是否像!%in%或%!in%那样对%in%作了短的求反?

Is there a short negation of %in% in R like !%in% or %!in%?

我当然可以用!(c("A", "B") %in% c("B", "C"))取反c("A", "B") %in% c("B", "C")(请参阅此问题)，但是我希望采用一种更直接的方法，并保留一对方括号(就像大多数人更喜欢c("A", "B") != c("B", "C")而不是!(c("A", "B") == c("B", "C"))一样.)

Of course I can negate c("A", "B") %in% c("B", "C") by !(c("A", "B") %in% c("B", "C")) (cf. this question) but I would prefere a more straight forward approach and save a pair of brackets (alike presumably most people would prefer c("A", "B") != c("B", "C") over !(c("A", "B") == c("B", "C"))).

推荐答案

不，没有内置函数可以执行此操作，但是您可以使用

No, there isn't a built in function to do that, but you could easily code it yourself with

`%nin%` = Negate(`%in%`)

或

`%!in%` = Negate(`%in%`)

---

请参阅此线程和后续讨论:％in％运算符-NOT IN

还指出，软件包Hmisc包含运算符%nin%，因此，如果您将其用于应用程序，则该软件包已经存在.

Also, it was pointed out the package Hmisc includes the operator %nin%, so if you're using it for your applications it's already there.

library(Hmisc)
"A" %nin% "B"
#[1] TRUE
"A" %nin% "A"
#FALSE

这篇关于否定R中的％in％的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！