Rename Files: paste-prefix

[budugulo]

Suppose in ./docs I have some PDF files e.g. 1-Intro.pdf, 2-Topics.pdf etc. How do I paste 1- as prefix ? For example, 1-Intro.pdf will become 1-1-Intro.pdf.

[technocrat]

This is better done with a shell script outside R

#!/usr/bin/sh
for f in *.pdf; do mv -- "$f" "1-$f.pdf"; done

[martin.R]

Something like this should work (not tested):

pdf_files <- list.files(pattern = "*.pdf") # adapt as required
file.rename(pdf_files, paste0("1-", pdf_files))

[budugulo]

Thanks! It works perfectly.