Basics

Question 1

Assigning values

Answer 1

• x = ?

- x

Question 2

Creating Vectors

Answer 2

• x = c(?, ?, ?, ?,?)

- x = c(“?”, “?”)

Question 3

Sequencing

Answer 3

• x:y

- seq(from=x, to=y, by=?)

Question 4

Repeating

Answer 4

• rep(x, times=?)

- rep(“?”, times=?)

Question 5

Extracting from a vector

Answer 5

E.g. if: 
y = c(1, 3, 5, 7, 9)
then:
y[3]
would extract the third number = 5
if:
y = c(1, 3, 5, 7, 9)
then 
y[-3]
would extract everything but the third number = 1 3 7 9

Question 6

Constructing a matrix

Answer 6

matrix(c(?,?,?,?,?,?), nrow=?, byrow=TRUE/FALSE)

Question 7

Extracting from a matrix

Answer 7

?