Type checking and conversion in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the variable x is numeric.

R Programming

is_numeric <- is[1](x)

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Anumeric

Attempts:

3 left

💡 Hint

Common Mistakes

Using is.integer() instead of is.numeric()

Using typeof() instead of is.numeric()

The function is.numeric() checks if a variable is numeric in R.

2fill in blank

medium

Complete the code to convert the variable y to a character type.

R Programming

y_char <- as[1](y)

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Anumeric

Bcharacter

Clogical

Dinteger

Attempts:

3 left

💡 Hint

Common Mistakes

Using as.numeric() instead of as.character()

Using as.logical() instead of as.character()

The function as.character() converts a variable to character type in R.

3fill in blank

hard

Fix the error in the code to check if z is a logical type.

R Programming

is_logical <- is[1](z)

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Alogical

Bnumeric

Ccharacter

Dinteger

Attempts:

3 left

💡 Hint

Common Mistakes

Using is.numeric() instead of is.logical()

Using is.character() instead of is.logical()

The correct function to check logical type is is.logical().

4fill in blank

hard

Fill both blanks to create a named vector with names as characters and values as numeric.

R Programming

vec <- c([1] = 1, [2] = 2)

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A"a"

B"1"

C"b"

D"2"

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers as names without quotes

Using unquoted names

Vector names must be character strings, so use quotes around letters.

5fill in blank

hard

Fill all three blanks to create a list with a numeric, a character, and a logical element.

R Programming

my_list <- list(num = [1], char = [2], logi = [3])

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A42

B"hello"

CTRUE

DFALSE

Attempts:

3 left

💡 Hint

Common Mistakes

Putting numbers inside quotes for numeric

Using FALSE instead of TRUE for logical

The list elements are numeric (42), character ("hello"), and logical (TRUE).