I have tried using various F/R regular expressions for removing all text characters and leaving only numbers in a filename with little or inconsistent success.
Removing one character is simple with [a-z] or \D and I even tried \D{n} and that did remove some. But, I am missing the idea of how this should work and knowing so would give me a much better understanding of this application.
can someone share a working string to remove letters but not numbers from a filename?
Thanks,
Mike