Clarify documentation in mpg: very minor

[MaraAlexeev]

I was working through exercises using mpg in ggplot2 Elegant Graphics for Data Analysis, and I got stuck on trying to figure out what a drive train was.

I finally realized the variable drv means drive train. Could the documentation be updated to identify drv as meaning drive train?

Currently: drv f = front-wheel drive, r = rear wheel drive, 4 = 4wd

Suggested: drv the type of drive train, where f = front-wheel drive, r = rear wheel drive, 4 = 4wd

[yutannihilation]

Thanks, sounds good to me. Do you want to try to create a pull request? You need to modify R/data.R and regenerate the doc by devtools::document().

https://github.com/tidyverse/ggplot2/blob/b8420241309c8eea00d7086002c01cdf38a50eac/R/data.R#L103

[MaraAlexeev]

I will! Thanks.

On Sat, Aug 17, 2019 at 4:03 AM Hiroaki Yutani notifications@github.com wrote:

Thanks, sounds good to me. Do you want to try to create a PR? You need to modify R/data.R and regenerate the doc by devtools::document().

https://github.com/tidyverse/ggplot2/blob/b8420241309c8eea00d7086002c01cdf38a50eac/R/data.R#L103

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