Check your understanding
Quiz
You have finished the dplyr section: reading and tidying data, the core verbs, grouped summaries, and missing values. This short quiz checks what stuck. Pick an answer to continue; you can retry until it clicks. The last two steps are live R, run them and tinker.
Question 1 of 8
Spotting untidy data
A sales table has one column per month, Jan, Feb, and Mar, each holding that month's revenue. By the rules of tidy data, what is the issue?
Right. You would reshape those three columns into a
month column and a revenue column.That would make the table less tidy, not more.