I'm struggling with one thing: I have an R dataframe with individual ID, entry year and exit year for each individual. It looks like:
id Entry Exit
1 1988 1990
2 1986 1987
I need a new dataframe where the interval (entry, exit) is expanded into the years it contains, ie I need this:
I have not been able to create the right loop and I'd be very grateful for your help.
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