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8.2.45.42 octave.dataset.mtcars ¶

Static Method: out = mtcars () ¶

Motor Trend 1974 Car Road Tests

Description ¶

The data was extracted from the 1974 Motor Trend US magazine, and comprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973–74 models).

Format ¶

mpg

Fuel efficiency in miles/gallon

cyl

Number of cylinders

disp

Displacement (cu. in.)

hp

Gross horsepower

drat

Rear axle ratio

wt

Weight (1,000 lbs)

qsec

1/4 mile time

vs

Engine type (0 = V-shaped, 1 = straight)

am

Transmission type (0 = automatic, 1 = manual)

gear

Number of forward gears

carb

Number of carburetors

Note ¶

Henderson and Velleman (1981) comment in a footnote to Table 1: “Hocking [original transcriber]’s noncrucial coding of the Mazda’s rotary engine as a straight six-cylinder engine and the Porsche’s flat engine as a V engine, as well as the inclusion of the diesel Mercedes 240D, have been retained to enable direct comparisons to be made with previous analyses.”

Source ¶

Henderson and Velleman (1981). Building multiple regression models interactively. Biometrics, 37, 391–411.

Examples ¶

# TODO: Port this example from R