https://departmentfortransport.github.io/R-cookbook/dates-times.html string –> time 시각 시간 as.difftime https://onesixx.com/lubridate/ hms https://campus.datacamp.com/courses/working-with-dates-and-times-in-r/problems-in-practice?ex=5 hh:mm:ss format ‘difftime’ class를 기본 자정부터 second의 numeric vector (digits.secs 옵션으로 micro secound까지 표현 가능) cron https://stackoverflow.com/questions/22659947/r-how-to-handle-times-without-dates package chron requires extra work to add seconds, and time Read more…
