matlab - Adding an element of an array with respective element of other arrays -

i have multiple array, number can arbitrary. size of array same. how add each element of respective element of arrays , maybe save in array

a1 = [1 2 3 4 5 6]  a2 = [1 2 3 4 5 6]  .  .  .  .  final = [1+1+1+...  2+2+2+.... 3+3+3+3.... 4+4+4.... 5+5+5+5...   6+6+6+6...] 

let's have structure (as write in comments):

main = struct('err',{1:6,5:10,1:6,1:6},'seg_err',{1:6,5:10,1:6,5:10}); 

you can convert matrix:

m = vertcat(main.seg_err);; 

and take sum in simple command:

final = sum(m) 

which results:

final =       12    16    20    24    28    32 

and @beaker :)