Convert Vector to Matrix in R (Example)
In this article you’ll learn how to switch from vector to matrix class in R programming.
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With that, let’s get started.
Creation of Example Data
As a first step, we’ll have to create some example data:
vec <- 1:15 # Create example vector vec # Print example vector #  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
The previous output of the RStudio console shows that our example data is a vector consisting of 15 numeric elements.
Example: Converting Vector to Matrix
In this example, I’ll show how to create a matrix based on our example vector (or array) using the matrix function in R.
Have a look at the following R code:
mat <- matrix(vec, ncol = 3) # Convert vector to matrix mat # Print matrix # [,1] [,2] [,3] # [1,] 1 6 11 # [2,] 2 7 12 # [3,] 3 8 13 # [4,] 4 9 14 # [5,] 5 10 15
As you can see based on the previous output of the RStudio console, we have created a numeric matrix containing of five rows and three columns.
Video & Further Resources
I have recently released a video on my YouTube channel, which illustrates the R syntax of this page. You can find the video tutorial below:
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In addition, you might have a look at some of the other tutorials of this homepage:
- Convert Factor to Character Class
- Multiply Rows of Matrix by Vector in R
- Convert Data Frame Row to Vector
- Convert Matrix to Vector in R
- Introduction to R Programming
In summary: In this R post you learned how to convert and reshape a vector to a matrix with multiple columns. Let me know in the comments below, if you have additional comments and/or questions.
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