©Themoon EXAM SOLUTIONS
27/11/2024 11:35AM
MGSC 291 Exam 1 University of South
Carolina Answers
putting in a dataset - Answers✓✓data<-
c(81,85,93,93,99,76,75,84,78,84,81,82,89,81,96,82,74,70,84,86,80,70,131,75,88,102,115,89,82
,79,106)
length(data) - Answers✓✓tells you how may entries are in your vector
sort(data) - Answers✓✓puts data smallest to largest
summary(data) - Answers✓✓returns the five number summary and the sample mean
mean(data)
sd(data)
sum(data) - Answers✓✓sample mean
sample standard deviation
adds all the elements of the vector
seq(1,100,1)
seq(2,100,2) - Answers✓✓tells r to create the sequence of numbers from 1 to 100 by 1 (1,2,3...)
1:100 does the same thing
(2,4,6...100)
, ©Themoon EXAM SOLUTIONS
27/11/2024 11:35AM
data<-read.table(file.choose(),header=TRUE)
read.cvs - Answers✓✓calls this dataset into r and you can name it whatever you want
getwd() - Answers✓✓creates the current working directory and calls in your data too
dim(data) - Answers✓✓checks dimensions of data
data - Answers✓✓type the name of the data to see it
data[1:5] - Answers✓✓calls in the first five rows of the dataset if you are working with a large
dataset
head(data) - Answers✓✓shows the first few rows
data[,1:2] - Answers✓✓all rows for columns 1 and 2
data[1:5,1:2] - Answers✓✓first five rows and first two columns
str(data) - Answers✓✓structure of the object
View(data) - Answers✓✓(capital V) puts your data in a viewable popup window
data$shoes - Answers✓✓calls in the column called shoes
27/11/2024 11:35AM
MGSC 291 Exam 1 University of South
Carolina Answers
putting in a dataset - Answers✓✓data<-
c(81,85,93,93,99,76,75,84,78,84,81,82,89,81,96,82,74,70,84,86,80,70,131,75,88,102,115,89,82
,79,106)
length(data) - Answers✓✓tells you how may entries are in your vector
sort(data) - Answers✓✓puts data smallest to largest
summary(data) - Answers✓✓returns the five number summary and the sample mean
mean(data)
sd(data)
sum(data) - Answers✓✓sample mean
sample standard deviation
adds all the elements of the vector
seq(1,100,1)
seq(2,100,2) - Answers✓✓tells r to create the sequence of numbers from 1 to 100 by 1 (1,2,3...)
1:100 does the same thing
(2,4,6...100)
, ©Themoon EXAM SOLUTIONS
27/11/2024 11:35AM
data<-read.table(file.choose(),header=TRUE)
read.cvs - Answers✓✓calls this dataset into r and you can name it whatever you want
getwd() - Answers✓✓creates the current working directory and calls in your data too
dim(data) - Answers✓✓checks dimensions of data
data - Answers✓✓type the name of the data to see it
data[1:5] - Answers✓✓calls in the first five rows of the dataset if you are working with a large
dataset
head(data) - Answers✓✓shows the first few rows
data[,1:2] - Answers✓✓all rows for columns 1 and 2
data[1:5,1:2] - Answers✓✓first five rows and first two columns
str(data) - Answers✓✓structure of the object
View(data) - Answers✓✓(capital V) puts your data in a viewable popup window
data$shoes - Answers✓✓calls in the column called shoes
