Analysis of Mtcars Dataset

ra!nz
15 August 2018

Objectives

The Objectives of this analysis is to ;

show the mtcars dataset
plot graph weight(wt)_against_miles per gallon (mpg)

Mtcars Dataset Description

item	Details
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	A data frame with 32 observation on 11 variable.
Variable	- mpg:miles per gallon - cyl:number of cylinders - disp

Loading Mtcars Dataset

This is how to load the build-in dataset named mtcars

library(datasets)
library(ggplot2)
str(mtcars)

'data.frame':   32 obs. of  11 variables:
 $ mpg : num  21 21 22.8 21.4 18.7 18.1 14.3 24.4 22.8 19.2 ...
 $ cyl : num  6 6 4 6 8 6 8 4 4 6 ...
 $ disp: num  160 160 108 258 360 ...
 $ hp  : num  110 110 93 110 175 105 245 62 95 123 ...
 $ drat: num  3.9 3.9 3.85 3.08 3.15 2.76 3.21 3.69 3.92 3.92 ...
 $ wt  : num  2.62 2.88 2.32 3.21 3.44 ...
 $ qsec: num  16.5 17 18.6 19.4 17 ...
 $ vs  : num  0 0 1 1 0 1 0 1 1 1 ...
 $ am  : num  1 1 1 0 0 0 0 0 0 0 ...
 $ gear: num  4 4 4 3 3 3 3 4 4 4 ...
 $ carb: num  4 4 1 1 2 1 4 2 2 4 ...

plotting graph weight againts MPG

ggplot(mtcars,aes(wt,mpg))+geom_point(aes(colour=factor(cyl)))

plot of chunk {echo+FALSE