List to vector conversion in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert a list to a vector using unlist().

R Programming

my_list <- list(1, 2, 3)
my_vector <- [1](my_list)

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

Aunlist

Blist

Cc

Dvector

Attempts:

3 left

💡 Hint

Common Mistakes

Using list() instead of unlist() which keeps the data as a list.

Using c() which concatenates but does not flatten nested lists properly.

The unlist() function converts a list to a vector by flattening it.

2fill in blank

medium

Complete the code to convert a list of characters to a vector.

R Programming

char_list <- list('a', 'b', 'c')
char_vector <- [1](char_list)

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

Aunlist

Blist

Cas.vector

Dc

Attempts:

3 left

💡 Hint

Common Mistakes

Using as.vector() which does not flatten the list.

Using list() which keeps the data as a list.

unlist() converts the list of characters into a character vector.

3fill in blank

hard

Fix the error in converting a nested list to a vector.

R Programming

nested_list <- list(1, list(2, 3))
flat_vector <- [1](nested_list)

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

Avector

Bc

Cunlist

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using c() which does not flatten nested lists properly.

Using list() which keeps the nested structure.

unlist() correctly flattens nested lists into a vector.

4fill in blank

hard

Fill both blanks to create a numeric vector from a list and check its type.

R Programming

num_list <- list(4, 5, 6)
num_vector <- [1](num_list)
is_numeric <- is.[2](num_vector)

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

Aunlist

Bnumeric

Dvector

Attempts:

3 left

💡 Hint

Common Mistakes

Using list() instead of unlist() to convert.

Using is.numeric as a variable instead of a function.

unlist() converts the list to a vector, and is.numeric() checks if it is numeric.

5fill in blank

hard

Fill all three blanks to convert a list to a vector, filter values greater than 2, and get the length.

R Programming

values <- list(1, 3, 5, 2)
vec <- [1](values)
filtered <- vec[vec [2] 2]
count <- length([3])

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

Aunlist

B>

Cfiltered

Dvec

Attempts:

3 left

💡 Hint

Common Mistakes

Using list() instead of unlist() to convert.

Using wrong variable names in length().

unlist() converts the list to a vector, then we filter values greater than 2, and finally get the length of the filtered vector.