如何使用ggplot2在直方图条上显示百分比标签

Question

我已经看到很多关于将 y 轴上的计数转换为百分比的问题，但其中必须在条形图中。

我想在直方图中做类似的事情，但无法清楚地显示条形图上的标签。请告诉我哪里做错了。

x = runif(100, min = 0, max = 10)
data1 <- data.frame(x = x)

ggplot(aes(x = x), data = data1)+
geom_histogram(aes(y = (..count..)/sum(..count..)), bins = 10, breaks = 
seq(0,10,1), fill = "blue", col = "black")+
geom_text(aes(y = ((..count..)/sum(..count..)), 
            label = scales::percent((..count..)/sum(..count..))), 
        stat = "count", vjust = -10)+ 
scale_y_continuous(labels = scales::percent)

输出：

Answer 1

使用带有中断和标签的scale_y_continous 将解决您的问题。

  data1 <- data.frame (x = runif(100, min = 0, max = 10))
ggplot(aes(x=x), data1) + stat_bin(aes(y = ..count..)) 
ggplot(data1, aes(x = x)) + geom_histogram(fill = "blue", col = "black")+ scale_y_continuous(breaks = seq(0,10,1),labels = paste(seq(0, 10, by = 1) / 100, "%", sep = ""))+geom_text(aes(y = (..count..),label =  scales::percent((..count..)/sum(..count..))), stat="bin",colour="green",vjust=2) 

或者，您可以像这样指定要添加百分比的位置：

geom_text(aes(y = (..count..)+0.5))

当然，您也可以更改颜色。来自，

stat="bin",colour="your prefer color "

您还可以按如下方式更改箱的宽度：

geom_histogram(fill = "blue", col = "black", binwidth = 0.5)