R adding days to a date

Question

I have a date that I would like to add days to in order to find some future date     for instance how would I find the date that is 45 days after 1 1 2001

User · Accepted Answer

Use     gt  as Date  2001-01-01     45  1   2001-02-15

User · Answer

In addition to the simple addition shown by others  you can also use seq Date or seq POSIXt to find other increments or decrements  the POSIXt version does seconds  minutes  hours  etc      gt  seq Date  Sys Date    length 2  by  3 months    2   1   2012-07-25

User · Answer

Just use    as Date  2001-01-01     45   from base R  or date functionality in one of the many contributed packages  My RcppBDT package wraps functionality from Boost Date Time including things like  date of third Wednesday  in a given month   Edit  And egged on by  Andrie  here is a bit more from RcppBDT  which is mostly a test case for Rcpp modules  really    R gt  library RcppBDT  Loading required package  Rcpp R gt   R gt  str bdt  Reference class  Rcpp date   package   GlobalEnv   with 0 fields  and 42 methods  of which 31 are possibly relevant     addDays  finalize  fromDate  getDate  getDay  getDayOfWeek  getDayOfYear      getEndOfBizWeek  getEndOfMonth  getFirstDayOfWeekAfter     getFirstDayOfWeekInMonth  getFirstOfNextMonth  getIMMDate  getJulian      getLastDayOfWeekBefore  getLastDayOfWeekInMonth  getLocalClock  getModJulian     getMonth  getNthDayOfWeek  getUTC  getWeekNumber  getYear  initialize      setEndOfBizWeek  setEndOfMonth  setFirstOfNextMonth  setFromLocalClock     setFromUTC  setIMMDate  subtractDays R gt  bdt fromDate  as Date  2001-01-01     R gt  bdt addDays  45   R gt  print bdt   1   2001-02-15  R gt

User · Answer

You could also use  library lubridate  dmy  1 1 2001     days 45

[r] R adding days to a date

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