本文介绍了在ggplot和stat_function()中叠加对数正态密度的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 我尝试通过 stat_function()在 ggplot 中添加一个函数,但无法找出我的错误。这个例子产生了一个漂亮的情节: $ p $ data ggplot(data = data,aes(x = x))+ geom_histogram(aes(y = ..density ..))+ stat_function(fun = dnorm,size = 1 ,color ='gray',args = list())+ opts(title =利率变化柱状图)+ theme_bw() 但是当我尝试叠加一个对数正态密度时,它不能按预期工作(或者我应该像预期的那样说这是行不通的): $ (数据=数据帧)(x = rf(10000,df1 = 7,df2 = 120)) ggplot(data =数据,aes(x = x))+ geom_histogram(aes(y = ..density ..))+ stat_function(fun = dnorm,size = 1,color ='gray',args = list(log = TRUE))+ opts(title =利率变化柱状图)+ theme_bw() 所以这里是我希望的简单问题:我在这里做错了什么?我想这是一个非常简单的问题,我只是没有看到答案 - 对不起。解决方案使用 dlnorm ,对数正态分布的密度函数: ggplot(data = data, aes(x = x))+ geom_histogram(aes(y = ..density ..))+ stat_function(fun = dlnorm,size = 1,color ='gray')+ opts(title =利率变化的直方图)+ theme_bw() I try to superimpose a function via stat_function() in ggplot but can't figure out my mistake. this example produces a nice looking plot:data <- data.frame(x=rt(10000, df=7))ggplot(data=data, aes(x=x)) + geom_histogram(aes(y = ..density..)) + stat_function(fun =dnorm, size=1, color='gray', args=list()) + opts(title="Histogram of interest rate changes") + theme_bw()but when i try to superimpose a log-normal density this doesn't work as expected (or should I say as expected this doesn't work ;):data <- data.frame(x=rf(10000, df1=7, df2=120))ggplot(data=data, aes(x=x)) + geom_histogram(aes(y = ..density..)) + stat_function(fun =dnorm, size=1, color='gray', args=list(log=TRUE)) + opts(title="Histogram of interest rate changes") + theme_bw()so here's my hopefully simple question: what am I doing wrong here? I guess this is a really simple problem I just don't see the answer - sorry. 解决方案 Use dlnorm, the density function of the log-normal distribution:ggplot(data=data, aes(x=x)) + geom_histogram(aes(y = ..density..)) + stat_function(fun = dlnorm, size=1, color='gray') + opts(title="Histogram of interest rate changes") + theme_bw() 这篇关于在ggplot和stat_function()中叠加对数正态密度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! 上岸,阿里云!
09-05 20:42