Append to Vector in Loop in R (Example) | Add Value in while- & for-Loops

In this tutorial you’ll learn how to add new vector elements in a for-loop in the R programming language.

Table of contents:

Let’s take a look at some R codes in action.

Creation of Example Data

Let’s first create some example data:

my_vec <- 1:5                       # Create example vector
my_vec                              # Print example vector
# 1 2 3 4 5

As you can see based on the previous output of the RStudio console, our example data is a numeric vector ranging from 1 to 5.

Example: Adding New Elements to Vector in for-Loop

In this Section, I’ll show how to append new vector elements to our original vector in a for-loop.

The following for-loop has three iterations and in each iteration we are creating a new vector element and we are concatenating this element to our vector:

for(i in 1:3) {                     # Head of for-loop
  new_value <- i * (- 1)            # Creating new value
  my_vec <- c(my_vec, new_value)    # Appending new value to vector
}

Let’s have a look at our new vector in the RStudio console:

my_vec                              # Returning final vector
# 1  2  3  4  5 -1 -2 -3

As you can see, we added three new values to our vector. Note that we could use a similar R code in case we would like to append new vector elements in a while-loop or in a repeat-loop.

Video & Further Resources

Do you want to learn more about loops in R? Then I can recommend to watch the following video of my YouTube channel. In the video, I explain the topics of this tutorial in RStudio.

The YouTube video will be added soon.

In addition, I can recommend to read the other articles of this website.

• Store Results of Loop in Vector
• Loop Through Vector in R
• for-Loop in R
• Loops in R
• The R Programming Language

In this R tutorial you learned how to concatenate additional elements to a vector in a loop. If you have additional comments and/or questions, let me know in the comments section. Furthermore, please subscribe to my email newsletter to get updates on new articles.