Reading through part 1, my understanding was that the data frame would use select() and only contain the 4 columns listed. The following parts require the newly calculated column, but also additional columns that are not available if the data frame was created using select()
ethanwhite
commented
4 years ago
Reading through part 1, my understanding was that the data frame would use select() and only contain the 4 columns listed. The following parts require the newly calculated column, but also additional columns that are not available if the data frame was created using select()