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  1.  
  2. strings <- c("d1 x2 d2x4 5 specimens collected the smallest is 4 x 1 x 3 mm",
  3. 			" stomach x3 d2x4 8 pieces with the largest measuring  4 x 1 x 3 mm")
  4.  
  5. strings <- gsub("\\b(\\d+)(\\s+(?:specimens|pieces))", ".\\1\\2", strings, perl = TRUE)
  6. strings
Success #stdin #stdout 0.22s 39896KB
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[1] "d1 x2 d2x4 .5 specimens collected the smallest is 4 x 1 x 3 mm"     
[2] " stomach x3 d2x4 .8 pieces with the largest measuring  4 x 1 x 3 mm"
https://ideone.com/Kwek29
language:
R (R 3.5.2)
created:
5 years ago
visibility:
public

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