按频率排序唯一值 [英] Order unique values by frequency

问题描述

我需要使用什么函数来在 R 程序的列表中排名前四个最流行的词?

What function do I need to use to rank first four most popular words in list in R program?

例如

c("apple", "banana", "apple", "banana", "banana", 
  "desk", "pen", "pen", "pen", "pen")

让它像

"pen"
"banana"
"apple"
"desk"

谢谢

推荐答案

您可以按降序对表格中的值进行排序，然后根据名称获取您要查找的输出.试试这个:

You can sort the tabled values in decreasing order and then take the names to get the output you're looking for. Try this:

> x <- c("apple", "banana", "apple", "banana", "banana", 
         "desk", "pen", "pen", "pen", "pen")
> names(sort(table(x), decreasing = TRUE))
## [1] "pen"    "banana" "apple"  "desk"  

这篇关于按频率排序唯一值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！