Named vectors in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a named vector with names 'a', 'b', 'c'.

R Programming

vec <- c(1, 2, 3)
names(vec) <- [1]

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

Ac(a, b, c)

Blist('a', 'b', 'c')

Cc('a', 'b', 'c')

Dc("a", "b")

Attempts:

3 left

💡 Hint

Common Mistakes

Using list() instead of c() for names.

Not using quotes around names.

Assigning fewer names than vector elements.

Use c('a', 'b', 'c') to assign names to the vector elements.

2fill in blank

medium

Complete the code to access the element named 'b' from the named vector.

R Programming

vec <- c(x=10, y=20, b=30)
value <- vec[[1]]

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A"b"

B2

Cb

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using the name without quotes.

Using the wrong index number.

Confusing names with variable names.

Use the name in quotes to access the element by name: vec["b"].

3fill in blank

hard

Fix the error in the code to correctly assign names to the vector.

R Programming

vec <- c(5, 10, 15)
names(vec) <- [1]

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Ac(1, 2, 3)

Bc('one', 'two')

Clist('a', 'b', 'c')

Dc('first', 'second', 'third')

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning fewer names than vector elements.

Using numeric vectors instead of character vectors for names.

Using list() instead of c() for names.

The names vector must have the same length as vec. Here, c('first', 'second', 'third') matches length 3.

4fill in blank

hard

Fill both blanks to create a named vector and access the element named 'green'.

R Programming

colors <- c([1])
names(colors) <- c('red', 'green', 'blue')
value <- colors[[2]]

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A5, 10, 15

B"green"

C"red"

Dc(5, 10, 15)

Attempts:

3 left

💡 Hint

Common Mistakes

Not using c() to create the vector.

Accessing element without quotes.

Using wrong names for access.

Use c(5, 10, 15) to create the vector and "green" to access the named element.

5fill in blank

hard

Fill all three blanks to create a named vector, assign names, and access the element named 'second'.

R Programming

vals <- [1]
names(vals) <- [2]
result <- vals[[3]]

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

Ac(100, 200, 300)

Bc('first', 'second', 'third')

C"second"

Dlist(100, 200, 300)

Attempts:

3 left

💡 Hint

Common Mistakes

Using list() instead of c() for vectors.

Assigning names with wrong length.

Accessing elements without quotes.

Create the vector with c(100, 200, 300), assign names with c('first', 'second', 'third'), and access the element named "second".