Using Rstudio please provide your code as well as a screenshot of your code ## File:...
Using Rstudio
please provide your code as well as a screenshot of your code
## File: lab5
## Author: A. Breitzman
## Description: Manipulating and summarizing a data set
##
------------------------------------------------------------------------
## Instructions: This worksheet is worth 5
points
## Exercises are worth 2.5 point each. If you cannot get the code
to work in the line limits specified, the maximum that you can earn
per exercise would be 1.5 points.
## 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
$7.400. Let's find it
which(myCars$Price==7.40)
## Row 31
myCars[31,]
##Ford Festiva
##Note we could do the above in one step
myCars[which(myCars$Price==7.40),]
## Exercise 1
## List all cars that cost under 10,000 in 1993 and only show the
Manufacturer, Model, Price, and Cylinders
## Do it in 1 line
## Begin your code here
## End your code here
## Exercise 2
## Repeat Exercise 1 with the following variation
## call the subset you create myCars2 and then do a summary of
myCars2
## you may have 2 lines for this
## Begin your cod here
## End your code here
Homework Answers
![File Edit View Misc Packages Windows Help library (MASS) dim (Cars93) [11 93 27 names (Cars93) 1] Manufacturer 4] Min.Pric](http://img.homeworklib.com/questions/3475ae90-2555-11ec-b9d7-e16283eae970.png?x-oss-process=image/resize,w_560)
Exercise 1
myCars[which(myCars$Price<10000),c(1,2,4,8)]
Break the code
which(myCars$Price<10000) - This selects the cars whose Price is below 10000 of myCars
c(1,2,4,8) - This selects columns 1,2,4 and 8 of myCars
Exercise 2
myCars2<-myCars[which(myCars$Price<10000),c(1,2,4,8)]
The result is stored in myCars2
summary(myCars2)
This gives the summary of myCars2
Add Answer to:
Using Rstudio
please provide your code as well as a screenshot of your code
## File:...
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please copy and paste the code don't screenshot it
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