R：在堆栈栏上显示字符或类别

Question

我正在尝试将类别和百分比添加到堆栈栏中的每个级别，例如：

Category  <- c(rep(c("A", "B", "C", "D"), times = 4))
Data      <- data.frame( Category)

p= ggplot(Data,aes(x=factor(""),fill=factor(Category)))+
  geom_bar(position="fill")+
  geom_text(aes(label=scales::percent(..count../sum(..count..))),   stat='count',position=position_fill(vjust=0.5))

这会产生这张图：

但我尝试使用此命令获取此图表，但我失败了

预期图表

p=ggplot(Data,aes(x=factor(""),fill=factor(Category)))+
  geom_bar(position="fill")+
  geom_text(aes(label=scales::percent(..count../sum(..count..))), stat='count',position=position_fill(vjust=0.5))

  p + geom_text(data=Data, aes(x=factor(""),label = Category),  position=position_fill(vjust=0.5))

Answer 1

您在获得所需文本的过程中进展顺利，我认为如果您添加 stat = "count" 并稍微调整 vjust，您就会得到想要的内容。

library(ggplot2)
Category  <- c(rep(c("A", "B", "C", "D"), times = 4))
Data      <- data.frame( Category)

ggplot(Data,aes(x=factor(""),fill=factor(Category)))+
  geom_bar(position="fill")+
  geom_text(aes(label=scales::percent(..count../sum(..count..))),   
            stat='count',position=position_fill(vjust=0.5)) +
  geom_text(aes(label = Category), fontface = "bold",
            stat = "count", position = position_fill(vjust = 0.25))

^{由 reprex package (v0.3.0)}

于 2021-01-09 创建

Answer 2

实现预期结果的另一种选择是利用 ggtext::geom_richtext 和一些 glue:

library(ggplot2)

Year      <- c(rep(c("2006-07", "2007-08", "2008-09", "2009-10"), each = 4))
Category  <- c(rep(c("A", "B", "C", "D"), times = 4))
Frequency <- c(168, 259, 226, 340, 216, 431, 319, 368, 423, 645, 234, 685, 166, 467, 274, 251)
Data      <- data.frame(Year, Category, Frequency)

my_lab <- function(x, y) {
  glue::glue("{scales::percent(x / sum(x))}<br><br><b>{y}</b>")
}

ggplot(Data,aes(x=factor(""), fill=factor(Category)))+
  geom_bar(position="fill")+
  ggtext::geom_richtext(aes(label = my_lab(..count.., ..fill..)), stat='count', label.color = NA, position=position_fill(vjust=0.5))

R：在堆栈栏上显示字符或类别

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