使用模式拆分字符串

Question

初始向量是

"WhiteRiver"   "microProcess" "PartsUnknown" "RedSox"

如何将其拆分为

White"   "River"   "micro"   "Process" "Parts"   "Unknown" "Red"  "Sox"

规则是在大小写之间分开。

Answer 1

如果v1是向量

unlist(strsplit(v1, "(?<=[a-z])(?=[A-Z])", perl=TRUE))
#[1] "White"   "River"   "micro"   "Process" "Parts"   "Unknown" "Red"    
#[8] "Sox"    

小写字母

(?<=[a-z])后悔

(?=[A-Z])预测大写字母

Answer 2

使用像@akrun这样的v1：

unlist(strsplit(sub("([a-z])([A-Z])", "\\1,\\2", v1), ","))
#[1] "White"   "River"   "micro"   "Process" "Parts"   "Unknown" "Red"     "Sox"

如果要分割的字数超过两个，请使用gsub代替sub