How to fill sequential numbers (starting from 1) in a column when identical items appear in another column?
Lets say I have a two column data. The first column partID, second column is a measured value for that part. Each part is measured N times so that partID column has rows with the ID appearing N times in the table until the next partID apepars. I want to create a new column with number of measurement repeats/Runs for a given part. So, for identical partIDs appearing in the partID column, I want to...