单色条形图

Question

我目前已经尝试过一门课程，并想在我的r-studio上复制它，但是，为什么提供下面的代码，我只能显示一个单色条形图？它与填充功能的基本颜色有关吗？谢谢！

head(mtcars)
library(ggplot2)

# Bar chart
ggplot(mtcars, aes(x = cyl, fill = am)) +
  geom_bar(position = "fill")

# Convert bar chart to pie chart
ggplot(mtcars, aes(x = factor(1), fill = am)) +
  geom_bar(position = "fill") +
  facet_grid(. ~ cyl) + # Facets
  coord_polar(theta = "y") + # Coordinates
  theme_void() # theme

Answer 1

欢迎您！我认为您只需要将<script src="https://unpkg.com/babel-standalone@6.26.0/babel.js"></script> <script type="text/babel"> //your code </script> 选项添加到group：

aes()

但是也许以这种方式它可能更具可读性：

ggplot(mtcars, aes(x = cyl, fill = am, group = am)) + geom_bar(position = "fill")