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  1. num <- 4
  2. splitvar <- ";"
  3. pattern <- paste0(".{1,", num-1, "}(?:",splitvar,"|$)|[^",splitvar,"]{",num,"}")
  4. pattern # ".{1,3}(?:;|$)|[^;]{4}"
  5. string <- c("a;a;aabbbb;ccddee;ff")
  6. unlist(regmatches(string, gregexpr(pattern, string)))
  7.  
  8. library(stringr)
  9. unlist(str_extract_all(string, pattern))
Success #stdin #stdout 0.29s 42476KB
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Standard input is empty
stdout
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[1] ".{1,3}(?:;|$)|[^;]{4}"
[1] "a;a;" "aabb" "bb;"  "ccdd" "ee;"  "ff"  
[1] "a;a;" "aabb" "bb;"  "ccdd" "ee;"  "ff"
https://ideone.com/kOF9nj
language:
R (R 3.5.2)
created:
3 years ago
visibility:
secret

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