# Test if Vector is Empty in R (Example)

This article shows how to **check if a vector object is empty** in the R programming language.

The tutorial contains these contents:

Letâ€™s dive right into the exampleâ€¦

## Creation of Example Data

First and foremost, I have to define some data that we can use in the following examples:

vec1 <- vector() # Create empty vector vec1 # Print empty vector # logical(0)

vec2 <- 1:5 # Create non-empty vector vec2 # Print non-empty vector # [1] 1 2 3 4 5

The previous R syntax has created two vector objects called vec1 and vec2. You may already notice that the first vector is empty, but the second vector contains several elements.

However, letâ€™s check this more systematically!

## Example: Test if Vector Object is Empty Using length() Function

This example explains how to check if a vector object is empty.

For this task, we can apply the length function as shown below:

length(vec1) # Check length of vector # [1] 0

As you can see, the length function has returned the value 0 after applying it to our first vector object (i.e. vec1 is empty).

We may also use the length function in combination with the == to return a logical indicator whether our data object is empty:

length(vec1) == 0 # Logical whether vector is empty # [1] TRUE

The R code above has returned the logical indicator TRUE, i.e. our data is empty.

For comparison, letâ€™s apply the same syntax to our second example vector:

length(vec2) # Check length of vector # [1] 5

The length function has returned the value 5, i.e. our second vector object is not empty.

This gets confirmed by running the following R code:

length(vec2) == 0 # Logical whether vector is empty # [1] FALSE

The RStudio console has returned the logical value FALSE, i.e. our second vector is not empty.

## Video & Further Resources

Do you want to learn more about the evaluation of whether a vector object is empty? Then you might want to have a look at the following video on my YouTube channel. Iâ€™m explaining the R codes of this article in the video:

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In addition, you might read some of the related tutorials on my website.

- Test if Vector Contains Given Element in R
- Test for Equality of All Vector Elements
- Test if Character is in String
- interactive() Function in R
- R Programming Overview

In summary: In this article, I have shown how to **test whether a vector object is empty** in the R programming language. Kindly let me know in the comments, in case you have further questions.

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