小编Car*_*cus的帖子

我已经发现了很多问题，但不知何故它并没有真正帮助我。我不明白如何更改 ggplot2 中密度直方图中的 binwidth，以便概率总和为 1。似乎只有当 binwidth 恰好为 1 时它才有效。这是一个示例：

set.seed(1)
df = data.frame("data" = runif(1000, min=0, max=100))

a = ggplot(data = df, aes(x = data))+  
    geom_histogram(aes(y=..density..),colour="black", fill = "white", 
    breaks=seq(0, 100, by = 50)) 


b = ggplot(data = df, aes(x = data))+  
    geom_histogram(aes(y =..density..), 
             breaks=seq(0, 100, by = 30), 
             col="black", 
             fill="white") 
c = ggplot(data = df, aes(x = data))+  
    geom_histogram(aes(y =..density..), 
             breaks=seq(0, 100, by = 10), 
             col="black", 
             fill="white")

d = ggplot(data = df, aes(x = data))+  
    geom_histogram(aes(y =..density..), 
             breaks=seq(0, 100, …