| Title: | EPA Fuel Economy Data |
| Version: | 1.0.0 |
| Description: | Fuel economy data from the EPA, 1985-2015, conveniently packaged for consumption by R users. |
| License: | CC0 |
| URL: | https://github.com/hadley/fueleconomy |
| BugReports: | https://github.com/hadley/fueleconomy/issues |
| Depends: | R (≥ 3.1.0) |
| Suggests: | dplyr |
| Encoding: | UTF-8 |
| LazyData: | true |
| RoxygenNote: | 7.1.0 |
| NeedsCompilation: | no |
| Packaged: | 2020-03-23 14:55:12 UTC; hadley |
| Author: | Hadley Wickham [aut, cre] |
| Maintainer: | Hadley Wickham <hadley@rstudio.com> |
| Repository: | CRAN |
| Date/Publication: | 2020-03-23 15:30:02 UTC |
Common models
Description
These models have at least 10 years worth of data. This dataset is suitable for a left-join designed to restrict the number of observations to a more manageable level.
Usage
common
Format
A dataset with variables make, model, n (total number of models) and years (total number of model-years).
Examples
if (require("dplyr")) {
vehicles %>% semi_join(common)
}
Vehicle data
Description
Fuel economy data from the EPA, 1985-2015. This dataset contains selected varaibles, and removes vehicles with incomplete data (e.g. no drive train data)
Usage
vehicles
Format
A data frame with variables:
- id
Unique EPA identifier
- make
Manufacturer
- model
Model name
- year
Model year
- class
EPA vehicle size class, http://www.fueleconomy.gov/feg/ws/wsData.shtml#VClass
- trans
Transmission
- drive
Drive train
- cyl
Number of cylinders
- displ
Engine displacement, in litres
- fuel
Fuel type
- hwy
Highway fuel economy, in mpg
- cty
City fuel economy, in mpg
Source
http://www.fueleconomy.gov/feg/download.shtml
Examples
if (require("dplyr")) {
vehicles
vehicles %>% group_by(year) %>% summarise(cty = mean(cty))
}