计算每个唯一值出现在 R 中的次数 [英] Count number of times each unique value appearing in R

问题描述

我有一个包含 46095 个字符串的值 arm_index.如果你这样做

I have a value arm_index which contains 46095 strings. If you do

> unique(arm_index)
 [1] "NULL"     "CMT1Y"    "TREAS6M"  "LIBOR6M"  "LIBOR1Y"  "COFI11TH"  "CMT5Y"    "TREAS1M" 
 [9] "CMT3Y"    "LIBOR1M"  "CMT6M"    "PRIMEWSJ"
> length(arm_index)
 [1] 46095

我想知道每个唯一值在此处出现的次数.像字符串CMT1Y"一样，这个字符串出现了多少次.我对 R 比较陌生，做了一些研究，但找不到任何有用的东西.任何建议将不胜感激.

I want to find out how many times each unique value appearing here. Like the string "CMT1Y", how many times this string appearing. I am relatively new to R and done some research but couldn't find anything useful. Any suggestion will be greatly appreciated.

推荐答案

你只需要:

table(arm_index)

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