r - increasing value by one with each occurrence of non-repeated number

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65947372/increasing-value-by-one-with-each-occurrence-of-non-repeated-number

Answer 1

A base R option with rle

> with(rle(v),rep(seq_along(values),lengths))
 [1] 1 1 2 3 3 3 4 4 5 6 6

or data.table::rleid

> data.table::rleidv(v)
 [1] 1 1 2 3 3 3 4 4 5 6 6