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  1. x <- c("T12_50;Y13_50;Y3_33", "Y15_100")
  2. library(stringr)
  3. res <- lapply(str_match_all(x, "Y\\d+_(\\d+)"), function(m) m[,-1])
  4. res
  5.  
  6. regmatches(x, gregexpr("Y\\d+_\\K\\d+", x, perl=TRUE))
Success #stdin #stdout 0.3s 44240KB
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Standard input is empty
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[[1]]
[1] "50" "33"

[[2]]
[1] "100"

[[1]]
[1] "50" "33"

[[2]]
[1] "100"
https://ideone.com/2dCYa7
language:
R (R 3.5.2)
created:
78 days ago
visibility:
secret

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