Data and Time in R and loop speed-up

Description

For each line below, that explains the Date formats, give an example (and explain it) on how the date format would look as an output from a code (line is for CODE and MEANING)

1. %a
2. %c
3. %j
4. %m
5. %p
6. %S
7. %x

Provide R commands to do the following:

1. subtract date 020-01-01 from 2021-01-01 (in R)
2. subtract time “2022-11-08 03:14:35 PST” from “2022-11-09 26:14:35 PST”
3. extract seconds of the day and day from data
4. find intervals between the dates
5. generate monthly sequence of dates of length 5 starting at “2020-04-21”

exemplify and explain the use of

1. lapply()
2. sapply()
3. vapply()

See rubric for the grading.

Dates and times needed for this assignment

https://www.stat.berkeley.edu/~s133/dates.html

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