列表离群值在数据帧

Question

我有8个变量（X1，X2 ... X8）的数据帧

我想使用获得的箱线图的离群值：

boxplot(dataframe, plot=FALSE)$out 

我的期望输出是让数据框列出每个变量的异常值。具体如下：

variable outlier 
x1  outlier1 from x1 
x1  outlier2 from x1 
x1  outlier3 from x1 
x1  outlier4 from x1 
x2  outlier1 from x2 
x2  outlier2 from x2 
x2  outlier3 from x2 
. 
. 
. 
x8  outliern from x8 

感谢您的支持，

Answer 1

这是你想要的吗？

> testdata <- data.frame(x1=runif(1e3),x2=rnorm(1e3),x3=rnorm(1e3)) 
> temp <- boxplot(testdata,plot=F) 
> cbind(temp$group,temp$out) 
     [,1]  [,2] 
[1,] 2 2.765277 
[2,] 2 2.754730 
[3,] 2 -2.714811 
[4,] 2 3.257889 
[5,] 3 2.605549 
[6,] 3 -3.261950 
[7,] 3 -3.057532 
[8,] 3 2.820352 
[9,] 3 2.602933 
[10,] 3 2.580897 
[11,] 3 2.899350