我有一个字符向量:
v1 <- c("Firstname LastnameFirstname Lastname",
"Firstname Lastname",
"Firstname Lastname",
"Firstname LastnameFirstname Lastname")
我希望能将小写字母后面跟着大写字母的字符串分割开来,并保留这两个字母。
期望输出为:
[1] "Firstname Lastname" "Firstname Lastname" "Firstname Lastname" "Firstname Lastname" "Firstname Lastname" "Firstname Lastname"
参考StackExchange的示例,我尝试使用strsplit
函数和gsub
函数:
unlist(strsplit( gsub("([a-z][A-Z])","\\1~",v1), "~" ))
但这并不是在字符之间进行分割,而是在正则表达式匹配到的分割点后进行分割:
[1] "Firstname LastnameF" "irstname Lastname" "Firstname Lastname" "Firstname Lastname" "Firstname LastnameF" "irstname Lastname"
我该如何在保留两个字符的情况下进行字符拆分?