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  1. x <- c("C 10.1 C 12.4","C 12", "C 45.5 C 10")
  2. unlist(strsplit(x, "(?<=\\d)\\s+(?=C)", perl=TRUE))
Success #stdin #stdout 0.22s 39304KB
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[1] "C 10.1" "C 12.4" "C 12"   "C 45.5" "C 10"
https://ideone.com/9FaYWD
language:
R (R 3.5.2)
created:
5 years ago
visibility:
secret

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