I have a dataframe set up similar to this **Person Value** Joe 3 Jake 4 Patrick 2 Stacey 1 Joe 5 Stacey 6 Lara 7 Joe 2 Stacey 1 I need to create a new column 'x' which keeps a running count of how many times each person's name has appeared so far in the list. Expected output: **Person Value** **x** Joe 3 1 Jake 4 1 Patrick 2 1 Stacey 1 1 Joe 5 2 Stacey 6 2 Lara 7 1 Joe 2 3 Stacey 1 3 All I've managed so far is to create an overall count, which is not what I'm looking for. Continue reading...
