Article,

Dates and Times Made Easy with lubridate

, and .
Journal of Statistical Software, 40 (3): 1--25 (April 2011)

Abstract

This paper presents the lubridate package for R, which facilitates working with dates and times. Date-times create various technical problems for the data analyst. The paper highlights these problems and offers practical advice on how to solve them using <b>lubridate</b>. The paper also introduces a conceptual framework for arithmetic with date-times in R.

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