r - 将quosure转换为R中的字符串

Question

我一直在使用带有 dplyr 的 quosures:

library(dplyr)
library(ggplot2)

thing <- quo(clarity)
diamonds %>% select(!!thing)
print(paste("looking at", thing))

[1] "looking at ~" "looking at clarity"

真想把放入quo的字符串值打印出来，但是只能得到如下:

print(thing)

<quosure: global>

~clarity

print(thing[2])

clarity()

substr(thing[2],1, nchar(thing[2]))

[1] "clarity"

有没有更简单的方法来“取消引用”quo()？

Answer 1

我们可以使用 quo_name

print(paste("looking at", quo_name(thing)))