r - ggplot2::position_stack 中的距离是如何缩放的？

Question

我想在 ggplot 的堆叠条旁边绘制一个带有标签的人口金字塔。我使用 position_stack(vjust=1.3) 使用下面的代码让标 checkout 现在条形的“顶部”旁边，但我不明白该命令如何缩放标签的位置。

library(tidyverse)

data.frame(
  sex = c("F", "F", "F", "F", "F", "F", "F", "F", "M", "M", "M", "M", "M", "M", "M", "M"), 
  ag = c("0-9", "10-19", "20-29", "30-39", "40-49", "50-59", "60-69", "70+"), 
  n = c(-0.21, -0.12, -0.09, -0.03, -0.04, -0.01, 0, 0, 0.22, 0.11, 0.06, 0.04, 0.02, 0.03, 0.01, 0),
  stringsAsFactors = F
) %>% 
  ggplot(aes(x=ag, y = n, fill=sex)) +
  geom_col() +
  scale_fill_brewer("",labels = c("Women", "Men"), palette = "Set1") +
  coord_flip() +
  geom_text(data = . %>% dplyr::filter(sex == "M"),
            aes(label = n),
            position=position_stack(vjust=1.3)) +
  geom_text(data = . %>% dplyr::filter(sex == "F"),
            aes(label = n),
            position=position_stack(vjust=-0.3)) 

在结果图中，标签与条形上边缘的距离不等。我希望标签整齐地出现在每个栏的旁边。

Answer 1

你可以试试position_nudge

   df %>% 
{ggplot(data=.,aes(x=ag, y = n, fill=sex,label = n)) +
  geom_col() +  
  geom_text(position = position_nudge(y = ifelse(.$sex == "F", -0.02, 0.02)))+
  coord_flip()}