如何在geom_text中显示与geom_bar组变量成比例的标签

这是一种解决方案，可以计算的比例，dplyr然后将结果通过管道传输到ggplot。
我也将所有theme设置都放在的同一调用中theme()。
我重新发布了数据创建代码，这次设置了RNG种子，以使数据示例可重现。

library(dplyr)
library(ggplot2)

Random %>%
  count(Trxn_type, YN, Place) %>%
  left_join(Random %>% count(Trxn_type, name = "m"), by = "Trxn_type") %>%
  mutate(Prop = n/m) %>%
  ggplot(aes(x = YN, y = Prop, fill = Place)) +
  geom_col(position = position_dodge()) +
  geom_text(aes(label = scales::percent(Prop)),
            hjust = -0.25, 
            position = position_dodge(0.9)) +
  facet_wrap(~ Trxn_type, scales = "free_x", ncol = 2) +
  scale_fill_brewer(palette = "Greens") +
  scale_y_continuous(limits = c(0, 1), labels = scales::percent) +
  xlab("Answers") +
  ylab("Frequency") +
  coord_flip() +
  theme(panel.background = element_rect(fill = "white"),
        legend.position = "bottom",
        strip.text.x = element_text(size = 15, colour = "black"),
        plot.title = element_text(size = 16, face = "bold"),
        axis.text = element_text(size = 12),
        axis.title = element_text(size = 12))

编辑。

根据OP的评论，这也是一种以计数的方式Place。上面代码的唯一更改是left_join指令。

  left_join(Random %>% count(Trxn_type, Place, name = "m"),
            by = c("Trxn_type", "Place")) %>%

数据创建代码。

set.seed(1234)
Random <- data.frame(replicate(3,sample(0:3,3024,rep=TRUE)))
Random$Trxn_type <- sample(c("Debit", "Credit"),
                           size = nrow(Random),
                           prob = c(0.76, 0.24), replace = TRUE)
Random$YN <- sample(c("Yes", "No"),
                    size = nrow(Random),
                    prob = c(0.76, 0.24), replace = TRUE)
Random$Place <- sample(c("PlaceA", "PlaceB"),
                       size = nrow(Random),
                       prob = c(0.76, 0.24), replace = TRUE)

Random <- Random[, 4:6]