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

mat1%%mat2 Actuall y works , this gives [ 16 9 11 ] but you want mat1 %% t(mat2). This means transpose of second matrix, then u can get [11 13 10 ]

Rcode:

mat1 = matrix(c(1,2,3),nrow=1,ncol=3,byrow=TRUE)
mat2 = matrix(c(3,1,2,2,1,3,3,2,1), nrow=3,ncol=3,byrow=TRUE)
print(mat1)
print(mat2 )
#matrix Multiplication
print(mat1 %*% mat2 )
# matrix multiply with second matrix with transpose
# Note of using  function t()
print(mat1 %*% t(mat2 ))