提取两个字符串之间不同的字符 [英] Extract characters that differ between two strings

问题描述

我使用 adist 来计算两个字符串之间不同的字符数：

  a<  - Happy day
b<  - Tappy Pay
 adist（a，b）＃result 2 
  / pre> 
 
 
现在我想提取不同的字符。在我的例子中，我想得到字符串Hd（或TP 
 
 
 
我试图查找 adist ， agrep 
解决方案
您可以使用以下操作序列：
 
 
 
 
 
使用 strsplit（） li> 
 
使用 setdiff（）来比较元素
 
 
 
 
 
 
 
尝试这样：
  strsplit（c（a，b），split =））
 [1]Hd
  
 
I have used adist to calculate the number of characters that differ between two strings:
a <- "Happy day"
b <- "Tappy Pay"
adist(a,b) # result 2
Now I would like to extract those character that differ. In my example, I would like to get the string "Hd" (or "TP", it doesn't matter).

I tried to look in adist, agrep and stringi but found nothing.
解决方案
You can use the following sequence of operations:


split the string using strsplit().
Use setdiff() to compare the elements
Wrap in a reducing function


Try this:
Reduce(setdiff, strsplit(c(a, b), split = ""))
[1] "H" "d"


                        
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