将字符串变量传递给forcats :: fct_reorder [英] Passing string variable to forcats::fct_reorder

问题描述

有什么想法如何将字符串排序变量传递给fct_reorder?

Any idea how to pass a string sorting variable to fct_reorder?

require(dplyr)
require(forcats)
require(ggplot2)

order_var = 'displ'

mpg %>% mutate(manufacturer = fct_reorder(manufacturer, order_var))
#> Error in mutate_impl(.data, dots): Evaluation error: length(f) == length(.x) is not TRUE.

尝试过bang bang !!:

mpg %>% mutate(manufacturer = fct_reorder(manufacturer, !!order_var))
#> Error in mutate_impl(.data, dots): Evaluation error: length(f) == length(.x) is not TRUE.

尝试过eval:

as.name(eval(order_var))
#> displ

mpg %>% mutate(manufacturer = fct_reorder(manufacturer, as.name(eval(order_var))))
#> Error in mutate_impl(.data, dots): Evaluation error: length(f) == length(.x) is not TRUE.

有什么建议吗?

推荐答案

啊解决了

mpg %>% mutate(manufacturer = fct_reorder(manufacturer, .[[order_var]]))

这篇关于将字符串变量传递给forcats :: fct_reorder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！