R-exercises – Parsing Dates and Time

Below are the solutions to these exercises on date and time

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# Exercise 1  #
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library(anytime)

## Warning: package 'anytime' was built under R version 3.4.4

library(lubridate)
mar_22_2018 <- c("mar-22-2018","2018/03/22", "2018-03-22","22 mar 2018")
anytime(mar_22_2018)

## [1] "2018-03-22 PDT" "2018-03-22 PDT" "2018-03-22 PDT" "2018-03-22 PDT"

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# Exercise 2  #
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anytime(mar_22_2018,asUTC = T)

## [1] "2018-03-21 17:00:00 PDT" "2018-03-21 17:00:00 PDT"
## [3] "2018-03-21 17:00:00 PDT" "2018-03-21 17:00:00 PDT"

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#             #
# Exercise 3  #
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as.POSIXct("2018-03-22 12:30:00")

## [1] "2018-03-22 12:30:00 PDT"

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# Exercise 4  #
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as.POSIXct("2018-03-22 12:30:00","Europe/London")

## [1] "2018-03-22 12:30:00 GMT"

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#             #
# Exercise 5  #
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require(lubridate)
ymd("2018-mar-22")

## [1] "2018-03-22"

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#             #
# Exercise 6  #
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dmy("22-mar-2018")

## [1] "2018-03-22"

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#             #
# Exercise 7  #
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  mdy("mar-22-2018")

## [1] "2018-03-22"

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#             #
# Exercise 8  #
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dym("22/2018/03")

## [1] "2018-03-22"

ymd("2018-03-22")

## [1] "2018-03-22"

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Parsing Dates and Time – Part 1: Solutions