Question

I have a string in R which is something like:

File_ABC777_PatientId789.DATA

or can be something like: File_ABC7878787_234_PatientId892.DATA

I want to extract the part of the string that is in between “PatientId” and “.DATA” …How do I do this in R ? In C# or other languages this is really easy and it’s usually done using a String POS Function … But I can’t seem to find a similar function in R …any thoughts ?

Cheers !!!
MadSeb

Answer 1

You could use ?sub:

x <- "File_ABC777_PatientId789.DATA"
sub(x=x, pattern="^.*PatientId([0-9]+).DATA$", replacement="\\1")