Multiplying two matrices in R

Question

I have 2 matrices.

The first one: [1,2,3]

and the second one:

[3,1,2
 2,1,3
 3,2,1]

I\'m looking for a way to

Answer 1

It's difficult to say what the best answer here is because the notation in the question isn't in R, it's in matlab. It's hard to tell if the questioner wants to multiple a vector, 1 row matrix, or 1 column matrix given the mixed notation.

An alternate answer to this question is simply switch the order of the multiplication.

v1 <- c(1,2,3)
v2 <- matrix(c(3,1,2,2,1,3,3,2,1), ncol = 3, byrow = TRUE)
v2 %*% v1

This yields an answer that's a single column rather than a single row matrix.