USING R STUDIO

## First we need to load a library library(MASS)

## If you got an error you may need to uncomment the next 2 lines #install.packages("MASS") #library(MASS)

dim(Cars93) ## 93 rows and 27 columns ## if you got an error message instead of 93 27 then go back to line 11 and reread it. ## Don't go any further until you get a 93 27 for line 15

##We can get the names of each column as follows names(Cars93)

##Recall to build a subset we can list the rows and columns we want. ##For example the next line will give us the first 2 rows and first 3 columns Cars93[1:2,1:3]

##Make a new file containing only columns I care about myCars <- Cars93[,c(1,2,3,5,7,8,10,11,12,25,26)]

##Let's look at first 2 rows myCars[1:2,]

##summary will give a nice summary of each column summary(myCars)

##Apparently in 1993 there was a car that cost only $7400. Let's find it which(myCars$Price==7.40) ## Row 31 myCars[31,] ##Ford Festiva ##Note we could do the above in one step

myCars[which(myCars$Price==7.40),]

## Exercise 1 ## List all cars that cost under 10,000 in 1993 and only show the Manufacturer, Model, Price, and Cylinders ## Do it in 1 line ## Begin your code here

## End your code here

## Exercise 2 ## Repeat Exercise 1 with the following variation ## call the subset you create myCars2 and then do a summary of myCars2 ## you may have 2 lines for this ## Begin your cod here

## End your code here