Create List of Matrices in R (Example)
In this article you’ll learn how to store multiple matrices in a list object in R.
The article will consist of this content:
So let’s take a look at some R codes in action…
Creation of Example Data
We’ll use the following data as basement for this R programming tutorial:
mat1 <- matrix(1:15, ncol = 3) # Create first example matrix mat1 # Print first example matrix
Table 1 shows the structure of our first example matrix: It contains five rows and three integer columns.
Let’s create a second matrix object:
mat2 <- matrix(letters[1:16], ncol = 4) # Create second example matrix mat2 # Print second example matrix
The output of the previous R syntax is shown in Table 2: Another matrix containing character letters.
Example: Create List of Matrices Using list() Function
This example demonstrates how to combine multiple matrix objects in a single list.
For this task, we can apply the list function as shown below:
my_list <- list(mat1, mat2) # Create list my_list # Print list # [] # [,1] [,2] [,3] # [1,] 1 6 11 # [2,] 2 7 12 # [3,] 3 8 13 # [4,] 4 9 14 # [5,] 5 10 15 # # [] # [,1] [,2] [,3] [,4] # [1,] "a" "e" "i" "m" # [2,] "b" "f" "j" "n" # [3,] "c" "g" "k" "o" # [4,] "d" "h" "l" "p"
As you can see, each matrix has been stored as a separate list element.
Video & Further Resources
Have a look at the following video on my YouTube channel. In the video, I illustrate the R programming syntax of this page in a live session in RStudio.
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In addition, you might want to read the related articles on this website. You can find some interesting articles below:
- Create List of Vectors in R
- Create List of Installed Packages in R
- Create List of Data Frames
- Create Nested List in R
- Introduction to R
In summary: In this article, I have explained how to combine multiple matrices in a list object in R programming. If you have additional questions, let me know in the comments. Furthermore, please subscribe to my email newsletter in order to get updates on new tutorials.
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