How to check if a Vector is Empty in R - Step by Step Examples

How to check if a Vector is Empty in R ?

Answer

To check if a vector is empty in R, you can use the length function or the is_empty function from the purrr package.

✐ Examples

1 Check if a Numeric Vector is Empty

In this example,

We create a numeric vector named num_vec with no elements.
We use the length function to check the length of num_vec.
If the length of num_vec is zero, it means the vector is empty.
We print a message indicating whether the vector is empty or not.

R Program

num_vec <- numeric(0)
if (length(num_vec) == 0) {
    print("Numeric vector is empty")
} else {
    print("Numeric vector is not empty")
}

Output

[1] "Numeric vector is empty"

2 Check if a Character Vector is Empty

In this example,

We create a character vector named char_vec with no elements.
We use the purrr package and its is_empty function to check if char_vec is empty.
If is_empty(char_vec) returns TRUE, it means the vector is empty.
We print a message indicating whether the vector is empty or not.

R Program

library(purrr)
char_vec <- character(0)
if (is_empty(char_vec)) {
    print("Character vector is empty")
} else {
    print("Character vector is not empty")
}

Output

[1] "Character vector is empty"

Summary

In this tutorial, we learned How to check if a Vector is Empty in R language with well detailed examples.

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