Extract text after “/” in a data frame column

Question

I have a data frame that has two columns Link and Value. The Link column has values like \"abcd.com/efgh/ijkl/mnop\" and is a URL. The

Answer 1

Try basename(). It

removes all of the path up to and including the last path separator (if any).

basename("abcd.com/efgh/ijkl/mnop")
# [1] "mnop"

It is vectorized, so you can just stick the whole column in there.

basename(rep("abcd.com/efgh/ijkl/mnop", 3))
# [1] "mnop" "mnop" "mnop"

So, to apply this to one column link of a data frame webdata, you can simply do

webdata$link <- basename(webdata$link)

The other obvious function would be sub(), but I think basename() will do the trick and it's easier.

sub(".*/", "", rep("abcd.com/efgh/ijkl/mnop", 3))