tells me it returns "data frame with lines by vehicle category and columns for category, type, Fuel, use and a additional column for each area." - What does the value in the column for each area mean?
"diary use" - do you mean "average daily kilometres driven by the vehicle type" ? Recommend to be a bit more verbose here.
Schuch666
commented
6 years ago
(part of https://github.com/openjournals/joss-reviews/issues/662)
?vehicles