Category "date-difference"

Find difference between two datetimes and format at Y-m-d H:i:s

I'm trying to get the difference between two datetimes and return it as a datetime. I've found examples using diff but I can't seem to get it right. $timein =

Is there a more efficient way to calculate the difference in months in R

I have a large data frame in a panel structure (201720 rows; 3 columns) which looks as follows: Name <- c("A", "A", "A", "B", "B", "B") Inception <- c(as