r - 如何在带有％标签的填充条的多面ggplot中显示“总计”？

Question

我有一个像这样的填充条形图

library(dplyr)
library(ggplot2)

df <- data.frame(facet=c(rep(1,6),rep(2,6)),type=rep(c('a','b','c'),2), subtype=c('x','y'), value=c(10,20,30,10,50,70))

df %>% group_by(type, facet) %>% 
mutate(pct=value/sum(value)) %>%
mutate(pos=cumsum(pct) - (0.5 * pct)) %>%
ggplot(aes(type, pct, fill=subtype)) + geom_bar(stat='identity') +
geom_text(aes(label=paste0(round(100*pct, 0), '%'),y=pos)) +   facet_grid(.~facet, margins=TRUE)

如果没有在刻面中显示总数，它可以工作。但由于用于显示 % 数据标签的方法（我想知道是否有更好的方法），总方面变得混乱。有什么建议吗？谢谢。

Answer 1

我正确排列了标签并事先定义了边距图。我想这是您期望的输出。我不知道是否有办法用facet_grid(., margin = TRUE).

df <- data.frame(facet=c(rep(1,6),rep(2,6)),type=rep(c('a','b','c'),2),
                 subtype=c('x','y'), value=runif(12, 0, 100))

df1  <- df %>% 
        arrange(desc(subtype)) %>% 
        mutate(facet = factor(facet, levels = c("1", "2", "(all)"))) %>%
        group_by(type, facet) %>% 
        mutate(pct=value/sum(value),
               pos=cumsum(pct) - (0.5 * pct)) 

df2 <- df1 %>%
      group_by(type, subtype) %>%
      summarise(facet = factor("(all)", levels = c("1", "2", "(all)")),
                pct = sum(pct)/2,
                pos = sum(pos/2))  

  bind_rows(df1, df2) %>%
  ggplot(aes(type, pct, fill=subtype)) + 
  geom_bar(stat='identity', position = "stack") +
  geom_text(aes(label=paste0(round(100*pct, 0), '%'),y=pos)) +   
  facet_grid(.~facet)