替换字符串中的特定字符 [英] Replace specific characters within strings

问题描述

我想从向量中的字符串中删除特定字符，类似于Excel中的查找和替换功能.

I would like to remove specific characters from strings within a vector, similar to the Find and Replace feature in Excel.

以下是我开始使用的数据:

Here are the data I start with:

group <- data.frame(c("12357e", "12575e", "197e18", "e18947")

我从第一列开始；我想通过删除e来产生第二列:

I start with just the first column; I want to produce the second column by removing the e's:

group       group.no.e
12357e      12357
12575e      12575
197e18      19718
e18947      18947

推荐答案

带有正则表达式和函数gsub():

With a regular expression and the function gsub():

group <- c("12357e", "12575e", "197e18", "e18947")
group
[1] "12357e" "12575e" "197e18" "e18947"

gsub("e", "", group)
[1] "12357" "12575" "19718" "18947"

gsub在这里所做的是用空字符串""替换每次出现的"e".

What gsub does here is to replace each occurrence of "e" with an empty string "".

有关更多帮助，请参见?regexp或gsub.

See ?regexp or gsub for more help.

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