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  1. vec <- c('1234', '+ 42', '1E+4', 'NR 12', '4.5E+04', '8.6E-02')
  2. res <- regmatches(vec, regexpr("[-+]?[0-9]*\\.?[0-9]+([eE][-+]?[0-9]+)?", vec))
  3. unlist(res)
Success #stdin #stdout 0.2s 185728KB
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stdin 
Standard input is empty
stdout 
[1] "1234"    "42"      "1E+4"    "12"      "4.5E+04" "8.6E-02"
https://ideone.com/q4xzSm
language:
R (R 3.5.2)
created:
7 years ago
visibility:
secret

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