r - 使用 position = fill 将百分比添加到条形图

Question

我已经创建了堆叠条形图，条形图内有相应的标签。但是，我想改变情节，这样position = fill. 这对我的情节有些奇怪。任何想法如何解决这一问题 ？

cat <- c (0,0,0,0,0,1,1,1,1,1)
value <- c(100,200,300,100,300,200,200,200,300,300)
N <- c(15,43,7,53,25,33,5,3,2,2)
year <- c(2014,2017,2018,2016,2015,2014,2016,2018,2017,2015)
exdata <- cbind(cat, value, N, year)

---

exdata <- as.data.frame(exdata)

exdata2 <- group_by(exdata, year) %>% mutate (pct = paste0((round(value/sum(value)*100, 2))," %"))
exdata2 <- as.data.frame(exdata2)

plot.exdata2 <- ggplot(exdata2, aes(year, value, fill = factor(cat))) +
  geom_bar(stat = "identity", position = "stack") + # position = stack
  geom_text(aes(label = exdata2$pct), position = position_stack(vjust = 0.5), size = 3.2) +
  theme_pubclean()

所需格式：

Answer 1

您可以尝试geom_col改用，因为建议使用 when stat = "identity"。此外，您还必须指定"fill"位置geom_text：

ggplot(exdata2, aes(year, value, fill = factor(cat))) +
  geom_col(position = "fill") + 
  geom_text(aes(label = pct), position = position_fill(vjust = 0.5))