从字符串中删除括号 [英] Remove parenthesis from a character string

问题描述

我正在尝试从R中的字符串中删除括号并遇到以下错误:

I am trying to remove a parenthesis from a string in R and run into the following error:

string <- "log(M)"
gsub("log", "", string) # Works just fine
gsub("log(", "", string) #breaks
# Error in gsub("log(", "", test) : 
#   invalid regular expression 'log(', reason 'Missing ')''

推荐答案

用双反斜杠转义括号:

gsub("log\\(", "", string)

(强制性: http://xkcd.com/234/)

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