你如何在 R 中制作一个堆叠条形图 plot，并在每个条形图上为每个堆叠的变量和 facet wrap 设置误差条？

Question

I am trying to make a stacked bar plot in R with facet wrap, filled by variable, but am not able to stack the bars. So far, I am able to make a box plot but cannot stack the boxes.

Example data:

structure(list(place = c("A", "B", "C", "A", "B", "C", "A", "B", 
"C"), person = c("Mica", "Mica", "Drew", "Sandra", "Tom", "Tom", 
"Nikata", "Beth", "Enrique"), value = c(95L, 96L, 94L, 70L, 78L, 
82L, 85L, 100L, 101L), variable = c("eng", "eng", "sci", "ma", 
"sci", "ma", "ar", "ar", "eng")), class = "data.frame", row.names = c(NA, 
-9L))

ggplot(data, aes(place, value)) +
  geom_boxplot(aes(color = variable))+
  facet_wrap(~person) +
  scale_color_manual(values = c("#3b3294","#f6cca0","#000000")) 

Is it possible to stack the bars instead of them being side by side? Thank you!

Answer 1

It seems you're looking for geom_bar and the position argument

ggplot(data, aes(place, value)) + 
  geom_col(aes(color = variable, fill = variable))

This will create stacked bar plots, while setting position = dodge will create bar plots side by side.

ggplot(data, aes(place, value)) + 
  geom_col(aes(color = variable, fill = variable), position = 'dodge')