```
A = matrix(
# Taking sequence of elements
c(1, 2, 3, 4, 5, 6, 7, 8, 9),
# Number of rows
nrow = 3,
# Number of columns
ncol = 3,
# By default matrices are in column-wise order
# So this parameter decides how to arrange the matrix
byrow = TRUE,
# Specifies the name given to each element of
# rows and columns of a matrix
dimnames = list(c("r1","r2","r3"), c("c1","c2","c3"))
)
# Column and row names can also be assigned like so:
# rownames(A) = c("a", "b", "c")
# colnames(A) = c("foo", "bar", "baz")
```