alist() Function in R (2 Examples)
In this article, I’ll illustrate how to create an alist object using the alist() function in the R programming language.
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Let’s jump right to the examples!
Example 1: Construct List of Function Arguments Using alist()
The following R programming code explains how to create a list of function arguments using the alist function in R.
Consider the R syntax below:
my_alist <- alist(x = , y = 5, x^2 + y) # Create alist object my_alist # Print alist object # $x # # # $y #  5 # # [] # x^2 + y
As you can see based on the previous output, we have created a list containing three elements. The first list element contains the x argument, the second list element contains the y argument and its default value (i.e. 5), and the third list element contains the function body.
Example 2: Convert alist() Output to User-Defined Function
In this example, I’ll illustrate how to convert a list created by the alist command to a user-defined function.
For this task, we can apply the as.function function as shown below:
my_fun <- as.function(my_alist) # Convert alist object to function my_fun # Print user-defined function # function (x, y = 5) # x^2 + y # <environment: 0x55832aa301c8>
The previous output shows the structure of our new function called my_fun.
Let’s apply this function to a certain x-value (i.e. 2):
my_fun(x = 2) # Apply user-defined function #  9
The result of our user-defined function is 9.
Video, Further Resources & Summary
Have a look at the following video on my YouTube channel. In the video, I’m explaining the content of this tutorial:
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Furthermore, you could have a look at some of the related articles on this homepage. I have released several articles already:
To summarize: At this point you should know how to use the alist() function in the R programming language. If you have further questions, let me know in the comments section. Furthermore, don’t forget to subscribe to my email newsletter to get updates on the newest articles.