如何在不重复的情况下使用forcat重新编码多个值

问题描述

我想使用forcats通过诸如yes =“ bad”，yes =“ 2”，no =“ 3”，no =“ good”的映射来重新编码因子x，但不重复码。 与yes = levels(x)[1:2]和no = levels(x)[3:4]类似。

<!-- language-all: lang-r -->


    library(forcats)

    x <- factor(c("bad","2","good","3","good"),levels = c("bad",2,3,"good"))

    fct_recode(x,yes = "bad",yes = "2",no = "3",no = "good")
    #> [1] yes yes yes no  no  no  no  no 
    #> Levels: yes no

    # I don't want to repeat yes and no
    levels(x)[1:2] # should be yes
    #> [1] "bad" "2"
    levels(x)[3:4] # should be no
    #> [1] "3"    "good"

^{由reprex package（v0.3.0）于2020-10-03创建}

解决方法

您可以使用-std=c++20 -Wall -pthread -stdlib=libc++：

arg_t()
awaiter_t()
await_ready()
await_suspend()
await_resume()
~awaiter_t()
~arg_t() -> destroyed after the awaiter is destroyed