在 ggplot 直方图中显示百分比

Question

我用百分比绘制直方图（效果很好）但是当我尝试打印百分比值时，y 轴的比例不再正确。

百分比直方图的代码（效果很好）如下：

data_impact_final %>%
  ggplot(aes(x = time_to_treat_month)) +
  geom_histogram(aes(y = (..count..)/sum(..count..)),binwidth=6) +
  scale_y_continuous(labels = scales::percent)

enter image description here

但是，当我尝试使用 stat_bin 在图表上打印百分比时，y 轴的比例不再正确。这是我用来打印百分比的代码：

data_impact_final %>%
  ggplot(aes(x = time_to_treat_month)) +
  geom_histogram(aes(y = (..count..)/sum(..count..)),binwidth=6) +
  stat_bin(binwidth=6, geom='text', color='white', aes(label = scales::percent((..count..)/sum(..count..))),position=position_stack(vjust = 0.5))+
  scale_y_continuous(labels = scales::percent)

enter image description here

感谢您的帮助

Answer 1

问题是标签位于 y=..count..。要解决您的问题，请在 stat_bin 中也使用 y=..count../sum(..count..)。

使用 ggplot2::mpg 作为示例数据：

library(ggplot2)
library(dplyr)

mpg %>%
  ggplot(aes(x = hwy)) +
  geom_histogram(aes(y = (..count..)/sum(..count..)),binwidth=6) +
  scale_y_continuous(labels = scales::percent)

mpg %>%
  ggplot(aes(x = hwy)) +
  geom_histogram(aes(y = (..count..)/sum(..count..)),binwidth=6) +
  stat_bin(binwidth=6, geom='text', color='white', aes(y = ..count../sum(..count..), label = scales::percent((..count..)/sum(..count..))),position=position_stack(vjust = 0.5))+
  scale_y_continuous(labels = scales::percent)

在 ggplot 直方图中显示百分比

Show percent in ggplot histogram

r

histogram

ggplot2