将字符串传递给tidybayes::spread_draws()

如何传递变量名 typical_r 到 tidybayes::spread_draws() 编程?在我的用例中 典型 以字符串形式输入,但我无法将字符串传递给 tidybayes::spread_draws() .

library(tidybayes)
library(tidyverse)

data(RankCorr, package = "tidybayes")

RankCorr %>%
  spread_draws(typical_r) # this works

x <- c("typical_r", "tau[1]")

RankCorr %>%
  spread_draws(x[1]) # this does not