Basics

Question 1

abc

Answer 1

Assigning values to objects (vectors)

Question 2

+ - * /

Answer 2

Arithmetic operators

Question 3

install.packages (“…”)

Answer 3

Installing external packages

Question 4

library (“…”)

Answer 4

Loading external packages

Question 5

ABC

Answer 5

Declaring a function / writing a function

Question 6

qplot (x,y)

x = c(...)
y = c(...)

Answer 6

Constructing a scatter plot

Question 7

qplot (abc, binwidth = #)

Answer 7

Constructing a histogram

Question 8

sample (object, size, replace, prob)

sample (abc, 3, TRUE, prob = c(…))

Answer 8

Sampling of a given object.
Object = Vector
Size = # of samples
Replace = TRUE (object to be repeated)
Prob = probability of each vector to be occurred

Question 9

?function

?qplot, ?sample

Answer 9

To check the property of a function (inbuilt or externally loaded)

Question 10

replicate (#, function ())

replicate (10000, roll ())

Answer 10

Repeats a function / command many times.

Question 11

args (ABC)

Answer 11

To see an argument of the function

Question 12

is.vector (abc)

Answer 12

Tests if an object is an atomic vector (TRUE / FALSE)

Question 13

length (abc)

Answer 13

Returns the length of an atomic vector

Question 14

die = c(1, 2, 3)

typeof (die)
## "double"

Answer 14

It’s a double type of atomic vector

Question 15

die = c(1L, 2L, -3L)

typeof (die)
## "integer"

Answer 15

It’s a integer type of atomic vector

Question 16

die = c(“hello”, “world”, “!”)

typeof (die)
## "character"

Answer 16

It’s a character type of atomic vector

Question 17

die = c(TRUE, TRUE, FALSE)

typeof (die)
## "logical"

Answer 17

It’s a logical type of atomic vector