Package 'mpg'

FuelEconomy.gov Data

Description

Extract fuel economy data from FuelEconomy.gov

Author(s)

Thomas J. Leeper

Maintainer: Thomas J. Leeper <[email protected]>

References

https://www.fueleconomy.gov/feg/ws/index.shtml

---

Fuel economy codebook

Description

View a list of variable names and descriptions for the vehicle fuel economy data

Usage

feCodebook(browse = FALSE)

Arguments

browse

A logical indicating whether to open the web-based codebok. Default is FALSE.

Author(s)

Thomas J. Leeper

---

Bulk data

Description

Download fuel economy bulk data files

Usage

feData(type, year = NULL, ...)

Arguments

type	The type of data file to retrieve.
year	Optionally, a two- or four-digit year after 1977.
...	Ignored.

Author(s)

Thomas J. Leeper

---

Vehicle emissions data

Description

Retrieve vehicle emissions data by vehicle ID

Usage

feEmissions(id = NULL, pick = FALSE, ...)

Arguments

id	A vehicle ID number.
pick	A logical indicating whether to select the ID number via an interactive menu.
...	Options passed to pickVehicle, if pick=TRUE.

Author(s)

Thomas J. Leeper

---

Vehicle makes

Description

Retrieve makes for a vehicle year

Usage

feMakes(year, ...)

Arguments

year	A character string containing a four-digit vehicle year.
...	Ignored.

Author(s)

Thomas J. Leeper

---

Vehicle models

Description

Retrieve models for a make and year

Usage

feModels(year, make, ...)

Arguments

year	A character string containing a four-digit vehicle year.
make	A character string containing a vehicle make.
...	Ignored.

Author(s)

Thomas J. Leeper

---

Vehicle options

Description

Retrieve vehicle options for a make-model-year

Usage

feOptions(year, make, model, ...)

Arguments

year	A character string containing a four-digit vehicle year.
make	A character string containing a vehicle make.
model	A character string containing a vehicle model.
...	Ignored.

Author(s)

Thomas J. Leeper

---

Fuel prices

Description

Retrieve current fuel prices by fuel type.

Usage

fePrices(...)

Arguments

...

Ignored.

Author(s)

Thomas J. Leeper

---

API Query

Description

Execute an API query

Usage

feQuery(op, baseurl = "http://www.fueleconomy.gov/ws/rest/", ...)

Arguments

op	A character string containing an API operation, and associated arguments.
baseurl	The base URL for conducting the API query.
...	Ignored.

Author(s)

Thomas J. Leeper

---

Vehicle fuel economy

Description

Retrieve vehicle fuel economy by vehicle ID

Usage

feVehicle(id = NULL, pick = FALSE, ...)

Arguments

id	A vehicle ID number.
pick	A logical indicating whether to select the ID number via an interactive menu.
...	Options passed to pickVehicle, if pick=TRUE.

Author(s)

Thomas J. Leeper

---

Fuel economy years

Description

Retrieve years for which fuel economy data is available

Usage

feYears(...)

Arguments

...

Ignored.

Author(s)

Thomas J. Leeper

---

My MPG data

Description

Retrieve all fuel economy data from My MPG by vehicle ID

Usage

mympgAll(id = NULL, pick = FALSE, ...)

Arguments

id	A vehicle ID number.
pick	A logical indicating whether to select the ID number via an interactive menu.
...	Options passed to pickVehicle, if pick=TRUE.

Author(s)

Thomas J. Leeper

---

My MPG averages

Description

Retrieve average fuel economy from My MPG by vehicle ID

Usage

mympgAvg(id = NULL, pick = FALSE, ...)

Arguments

id	A vehicle ID number.
pick	A logical indicating whether to select the ID number via an interactive menu.
...	Options passed to pickVehicle, if pick=TRUE.

Author(s)

Thomas J. Leeper

---

My MPG makes

Description

Retrieve My MPG makes

Usage

mympgMakes(...)

Arguments

...

Ignored.

Author(s)

Thomas J. Leeper

---

My MPG models

Description

Retrieve My MPG models for a given make

Usage

mympgModels(make, ...)

Arguments

make	A character string containing a vehicle make.
...	Ignored.

Author(s)

Thomas J. Leeper

---

My MPG vehicles

Description

Retrieve My MPG vehicle data by make and model

Usage

mympgVehicles(make, model, pick=FALSE, graphics=TRUE, ...)

Arguments

make	A character string containing a vehicle make.
model	A character string containing a vehicle model.
pick	A logical indicating whether to select the ID number via an interactive menu.
graphics	If pick=TRUE, a logical indicating whether to use graphical menus (the default) or, if FALSE, text-based menus.
...	Ignored.

Author(s)

Thomas J. Leeper

---

Interactive vehicle menus

Description

Use interactive menus to retrieve a vehicle identification number

Usage

pickVehicle(graphics = TRUE)

Arguments

graphics

A logical indicating whether to use graphical menus (the default) or, if FALSE, text-based menus.

Author(s)

Thomas J. Leeper

---