Ordered factors in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an ordered factor from the vector 'sizes'.

R Programming

sizes <- c("small", "medium", "large")
ordered_sizes <- factor(sizes, levels = c("small", "medium", "large"), ordered = [1])

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A"TRUE"

BFALSE

C1

DTRUE

Attempts:

3 left

💡 Hint

Common Mistakes

Using FALSE instead of TRUE for the 'ordered' argument.

Passing 'TRUE' as a string instead of a logical value.

Setting ordered = TRUE creates an ordered factor.

2fill in blank

medium

Complete the code to check if 'ordered_sizes' is an ordered factor.

R Programming

is.ordered([1])

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Afactor

Bsizes

Cordered_sizes

Dlevels

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the original vector instead of the factor.

Passing the function name 'factor' instead of a variable.

The function is.ordered() checks if the object is an ordered factor. Here, we check ordered_sizes.

3fill in blank

hard

Fix the error in the code to create an ordered factor with levels 'low', 'medium', 'high'.

R Programming

levels <- c("low", "medium", "high")
values <- c("medium", "high", "low")
factor_values <- factor(values, levels = levels, ordered = [1])

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ATRUE

B1

C"TRUE"

DFALSE

Attempts:

3 left

💡 Hint

Common Mistakes

Using FALSE or a string instead of TRUE.

Passing numeric 1 instead of logical TRUE.

To create an ordered factor, ordered must be set to TRUE (logical).

4fill in blank

hard

Fill both blanks to create an ordered factor with levels 'beginner', 'intermediate', 'advanced' and check if it is ordered.

R Programming

levels <- c("beginner", "intermediate", "advanced")
skills <- c("advanced", "beginner", "intermediate")
skill_factor <- factor(skills, levels = levels, ordered = [1])
check <- is.ordered([2])

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ATRUE

BFALSE

Cskills

Dskill_factor

Attempts:

3 left

💡 Hint

Common Mistakes

Using FALSE for the ordered argument.

Checking the original vector instead of the factor.

Set ordered = TRUE to create an ordered factor, then check if skill_factor is ordered.

5fill in blank

hard

Fill all three blanks to create an ordered factor from 'grades', set levels, and check if it is ordered.

R Programming

grades <- c("B", "A", "C")
levels <- c("C", [1], "A")
ordered_grades <- factor(grades, levels = levels, ordered = [2])
result <- is.ordered([3])

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A"B"

BTRUE

Cordered_grades

DFALSE

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving out the middle level in levels.

Using FALSE for ordered argument.

Checking the original vector instead of the factor.

Insert "B" as the middle level, set ordered = TRUE, and check if ordered_grades is ordered.