Capturing parts of string using regular expression in R

Question

I have these strings:

myseq <- c(\"ALM_GSK_LN_06.ID\",\"AS04_LV_06.ID.png\",\"AS04_SP_06.IP.png\")

What I want to do is to capture parts of

Answer 1

Totally stealing @hwnd's regex but in a tidyr/dplyr approach:

library(dplyr); library(tidyr)
data_frame(myseq) %>%
    extract(myseq, c('A', 'B', 'C'), '(.+)_([A-Z]+)[^.]+\\.([A-Z]+)')

##         A  B  C
## 1 ALM_GSK LN ID
## 2    AS04 LV ID
## 3    AS04 SP IP