Get Difference Between Dates in Years in R (Examples) | Calculate Time | difftime() & time_length()

R code of this video:

date1 ＜- as.Date("2027-05-17") # Create first example date
date1 # Print first example date

date2 ＜- as.Date("2022-10-01") # Create second example date
date2 # Print second example date

library("lubridate") # Load lubridate package

years_diff ＜- time_length(difftime(date1, date2), "years") # Calculate difference in years
years_diff # Print difference in years

years_diff_round ＜- round(years_diff) # Round difference in years
years_diff_round # Print rounded difference

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Please I need help on how to convert two entire columns and at the end I want to find the difference in time