Vectors Vol. 2 Exercises

November 15, 2016
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vector

[For this exercise, first write down your answer, without using R. Then, check your answer using R.]

Answers to the exercises are available here.

Exercise 1

Consider two vectors, x, y
x=c(4,6,5,7,10,9,4,15)
y=c(0,10,1,8,2,3,4,1)

What is the value of: x*y

Exercise 2

Consider two vectors, a, b

a=c(1,2,4,5,6)
b=c(3,2,4,1,9)
What is the value of: cbind(a,b)

Exercise 3

Consider two vectors, a, b

a=c(1,5,4,3,6)
b=c(3,5,2,1,9)
What is the value of: a<=b

Exercise 4

Consider two vectors, a, b

a=c(10,2,4,15)
b=c(3,12,4,11)
What is the value of: rbind(a,b)

Exercise 5

If x=c(1:12)
What is the value of: dim(x)
What is the value of: length(x)

Exercise 6

If a=c(12:5)
What is the value of: is.numeric(a)

Exercise 7

Consider two vectors, x, y

x=c(12:4)
y=c(0,1,2,0,1,2,0,1,2)
What is the value of: which(!is.finite(x/y))

Exercise 8

Consider two vectors, x, y

x=letters[1:10]
y=letters[15:24]
What is the value of: x

Exercise 9

If x=c('blue','red','green','yellow')
What is the value of: is.character(x)

Exercise 10

If x=c('blue',10,'green',20)
What is the value of: is.character(x)

Want to practice vectors a bit more? We have more exercise sets on this topic here.

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