Assessment Part 1: Dates, Times, and Text Mining
This assessment reviews several concepts about dates, times, and text mining. In part 1
on this page, you will practice extracting and manipulating dates in real datasets. In part 2
on the next page, you will walk through a sentiment analysis of a novel using steps
covered in the previous section.
Use the following libraries and options for coding questions:
options(digits = 3)
# 3 significant digits
: Some of these exercises use
datasets that were added in a July 2019
update. Make sure your package is up to date with the
. You can also update all packages on your
system by running
with no arguments, and you should consider
doing this routinely.
1/1 point (graded)
Which of the following is the standard ISO 8601 format for dates?