Running R code in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, world!" in R.

R Programming

print([1])

Drag options to blanks, or click blank then click option'

AHello, world!

B"Hello, world!"

Cprint("Hello, world!")

Decho "Hello, world!"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the text

Using print without quotes

Using echo instead of print

In R, to print text, you use print() with the text in quotes.

2fill in blank

medium

Complete the code to assign the value 10 to variable x in R.

R Programming

[1] <- 10

Drag options to blanks, or click blank then click option'

Avalue

B10

Cassign

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Putting 10 on the left side

Using = instead of <-

Using assign() function incorrectly

In R, the assignment operator <- assigns values to variables.

3fill in blank

hard

Fix the error in the code to calculate the sum of numbers 1 to 5.

R Programming

total <- [1](1:5)

Drag options to blanks, or click blank then click option'

Asum

Brange

Cadd

Dtotal

Attempts:

3 left

💡 Hint

Common Mistakes

Using add() instead of sum()

Using range() which returns min and max

Using variable names instead of functions

The sum() function calculates the total of a numeric vector in R.

4fill in blank

hard

Fill both blanks to create a vector of numbers from 1 to 10 and get its length.

R Programming

numbers <- [1](1, 10)
length_of_numbers <- [2](numbers)

Drag options to blanks, or click blank then click option'

Aseq

Blength

Csum

Dc

Attempts:

3 left

💡 Hint

Common Mistakes

Using c() instead of seq() for sequence

Using sum() instead of length()

Mixing up function names

seq(1, 10) creates a sequence from 1 to 10; length() returns the number of elements.

5fill in blank

hard

Fill all three blanks to create a named vector with scores and get the names of the vector.

R Programming

scores <- c([1] = 90, [2] = 85, [3] = 88)
names(scores)

Drag options to blanks, or click blank then click option'

AMath

BScience

CEnglish

DHistory

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers instead of names

Using incorrect subject names

Forgetting to name the vector elements

Named vectors use names like Math, Science, English to label scores.