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  1. ColumnA=c("Kuala Lumpur 2 new","old Jakarta Sector31",    "Sector 9, 7 Hong Kong","Jakarta new Sector22")
  2. gsub("^(?:.*Sector ?([0-9]+).*|.*)$","\\1",ColumnA)
Success #stdin #stdout 0.28s 22832KB
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[1] ""   "31" "9"  "22"
https://ideone.com/ObaZTF
language:
R (R 3.5.2)
created:
10 years ago
visibility:
secret

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