CRAN Recipes: DPLYR, Stringr, Lubridate, and RegEx in R

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2021

W. YarberryCRAN Recipeshttps://doi.org/10.1007/978-1-4842-6876-6_3

3. Lubridate: Date and Time Processing

William Yarberry¹  

(1)

Kingwood, TX, USA

 

Lubridate starts out answering a simple question—is it AM or PM, based on a date and hour? From there, it gets more complex but maintains a consistent approach to working with dates, times, and the combination date-times.

3.1 Hard-Coding Coffee Time

if (!require("lubridate")) install.packages("lubridate")

bk.coffee.time <- as.POSIXct("080418 10:11",

  format = "%y%m%d %H:%M")

am(bk.coffee.time)

## [1] TRUE

bk.time.span <- interval(ymd("2019-01-01"), ymd("2019-06-30"))

bk.time.span.value <- as.duration(bk.time.span)