How should I split and retain elements using strsplit?

Question

What a strsplit function in R does is, match and delete a given regular expression to split the rest of the string into vectors.

>strsplit(\"abc123def\",          


        

Answer 1

You could use lookaround assertions.

> test <- "abc123def"
> strsplit(test, "(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)", perl=T)
[[1]]
[1] "abc" "123" "def"