将正态分布曲线添加到直方图R [英] Add normal distribution curve to histogram R

问题描述

我正在尝试将正态分布曲线叠加到R中的直方图上.我知道这是一个曾经被问过的问题，但是我很难找到适合我的解决方案.

I'm trying to overlay a normal distribution curve onto a histogram in R. I know it's a question that's been asked before, but I'm having trouble getting the solutions to work for me.

这是我的代码:

hist(input_data$"X109_scalesraw_23", freq = TRUE, breaks = 30, 
     col = "cadetblue", xlim = c(0,30), ylim = c(0,150), 
     main = "023", xlab = "score")

推荐答案

您始终可以将curve与add=TRUE结合使用(告诉R将曲线添加到现有绘图中):

You can always use curve with add=TRUE (telling R to add the curve to existing plot):

data <- rnorm(100, 0, 1)
hist(data, freq = FALSE)
x<-seq(-4,+4,by=0.02)
curve(dnorm(x), add=TRUE)

产生

这篇关于将正态分布曲线添加到直方图R的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！