如何在 R 中创建堆积条形图，其中 y 轴应表示条形的百分比？

Question

I would like to create a stacked bar chart in R. My X axis just contains data on sex ie male or female. I just need the y axis to show percentages of the stacked bars. The "Survived" column is just a mixture of 0s and 1s. Ie 1 denoting that an indiividual survived an experience and 0 showing that the individual did not survive the experience. I am not sure what to put in for the y label. Can anyone help please?

ggplot(data = df, mapping = aes(x = Sex, y = ? , fill = Survived)) + geom_bar(stat = "identity")

Answer 1

One possible solution is to use dplyr package to calculate percentage of each categories outside of ggplot2 and then use those values to get your bargraph using geom_col :

library(dplyr)
df %>% count(Sex, Survive) %>%
  group_by(Sex) %>%
  mutate(Percent = n/sum(n)*100) 

# A tibble: 4 x 4
# Groups:   Sex [2]
  Sex   Survive     n Percent
  <fct>   <dbl> <int>   <dbl>
1 F           0    26    55.3
2 F           1    21    44.7
3 M           0    34    64.2
4 M           1    19    35.8

And now with the plotting part:

library(dplyr)
library(ggplot2)

df %>% count(Sex, Survive) %>%
  group_by(Sex) %>%
  mutate(Percent = n/sum(n)*100) %>%
  ggplot(aes(x = Sex, y = Percent, fill = as.factor(Survive)))+
  geom_col()

---

Reproducible example

df <- data.frame(Sex = sample(c("M","F"),100, replace = TRUE),
                 Survive = sample(c(0,1), 100, replace = TRUE))