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  1. example <- c("positive_1", "positive_2", "test_20_curve", "test_60_point", "percent_total")
  2. res <- sub("^(?:(?:.*\\D)?(\\d{2})(?:\\D.*)?|.+)$", "\\1", example)
  3. res <- res[nzchar(res)]
  4. res
Success #stdin #stdout 0.26s 39216KB
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[1] "20" "60"
https://ideone.com/rM6cNa
language:
R (R 3.5.2)
created:
2 years ago
visibility:
secret

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