1

Question 1

x %% y = ?

Answer 1

Modulo (remainder)

Question 2

x %/% y = ?

Answer 2

Integer Addition (quotient)

Question 3

How to make an R vector?

Answer 3

c(x,y,z)

Question 4

How to create an R vector by using a range?

Answer 4

x:y

E.g., var <- x:y

Question 5

How to create a vector using a range at specified increments?

Answer 5

seq(from=x, to= y, by=z)

Question 6

How to create an R vector with a certain number of increments yet hitting the max value?

Answer 6

seq(from = x, to = y, length = z)

Question 7

How to replicate a vector in R?

Answer 7

rep(vector, times = x)

Question 8

How to merge vectors in R?

Answer 8

Create vectors as vars, and then assign them to a new vector as c().

Question 9

How to turn vectors into arrays?

Answer 9

var = 1:4
var[]

Question 10

How to remove indexes from arrays in R?

Answer 10

array[-x]

Question 11

How to record how many elements are in a vector in R?

Answer 11

length(vector)

Question 12

How to extract unique (eliminating repeated elements) elements in a vector in R?
E.g., (1,2,2,3,2,3,4) -> (1,2,3,4)

Answer 12

unique(vector)

Question 13

How to determine how many times an element appears in a vector in R?

Answer 13

table(vector)

Question 14

How to extract the title names of a table in R?

Answer 14

names(table(vector))

Question 15

How to extract the values from a table in R?

Answer 15

table(vector)[index]