Under the hood, a matrix is a special kind of vector with two dimensions. Like a vector, a matrix can only have one data class. You can create matrices using the matrix function as shown below.
matrix(data = 1:6, nrow = 2, ncol = 3)
## [,1] [,2] [,3]
## [1,] 1 3 5
## [2,] 2 4...
