I want to give same number to the duplicate data in excel

问题

I want to give same number to the duplicate data in excel

 A      B
apple   1
apple   1
apple   1
ball    2
bat     3
dog     4
dog     4
goat    5

回答1:

Sort your column A then insert the number 1 in cell B2 and the following function in cell B3 and copy down.

in cell B2=1

function in cell B3: =if(A3=A2, B2, B2+1)

Update

来源：https://stackoverflow.com/questions/29914063/i-want-to-give-same-number-to-the-duplicate-data-in-excel