How to calculate inverse of 3d array matrices with size 3*3*18 ?

How to calculate inverse of 3d array matrices with size 3*3*18 ?

Answer 1

[KSSV]

A = rand(3,3,18) ; 
[m,n,p] =  size(A) ;
B = zeros(m,n,p) ; 
for i = 1:p
    B(:,:,i) = inv(A(:,:,i)) ; 
end

Answer 2

[Steven Lord]

If you're using release R2022a or later you could use the pageinv function. But if you're planning to invert these matrices in order to multiply them by something else to solve a system of equations, I would advise you to use pagemldivide (also release R2022a) instead of using both pageinv and pagemtimes (release R2020b.)