add matrix with respect to dimension

how to add (3*3) matrix with dimension 3 for M(a,b,c) where a and b are (3*3) and c corresponds to dimension. after adding M(a,b,c) the results gets stored in N. so N =sum(M(a,b,c),3);

whether the command which i have used was right since i am unable to get the correct result.

Answer 1

[Andrei Bobrov]

M = randi(25,3,3,4)
addarray = rand(3)

out = cat(3,M,addarray)

[jaah navi]

thanks