Where can I find the units for the dataset carsmall?

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Gabriele
Gabriele 2024-1-8
评论： Gabriele 2024-1-9
I am playing around with the dataset 'carsmall'. Apparently I am unable to find the units for accelaration, weight and displacement.
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Cris LaPierre
Cris LaPierre 2024-1-8
You can see on this page that carsmall.mat is a subset of carbig.mat.
Unofficial answer here, but it seems this data set ultimately tracks back to the StatLib library maintained by Carnegie Melon.
You can find the description here: https://lib.stat.cmu.edu/datasets/cars.desc
  • There are 406 observations on the following 8 variables: MPG (miles per gallon), # cylinders, engine displacement (cu. inches), horsepower, vehicle weight (lbs.), time to accelerate from O to 60 mph (sec.), model year (modulo 100), and origin of car (1. American, 2. European, 3. Japanese). These data appear on seven pages. Also provided are the car labels (types) in the same order as the 8 variables on seven separate pages. Missing data values are marked by series of question marks.

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Joe Vinciguerra
Joe Vinciguerra 2024-1-8
Since the dataset is just used for calculation examples it's not important, and thus not clearly documented. But doing a quick search, some of the functions that use it as an example in their help pages refer to weight as being in "pounds", and displacement as "cubic inch". I can't find anything explicitly describing the units for accelartion, but considering the context and the magnitude of the numbers I would assume it's in "seconds to go from 0-60 mph".

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