file 1
function main()
% your code
for loop for calling the sub () for N number of time
% your code which calculating the following 1x5 array.
% A = [1 2 3 4 5] % this is just example
% now pass this array as input to sub () like
max{i} = sub(A).....% here you passing A array to sub() and it giving you max value which store into another array max.
end of for loop.
file 2
% following code for sub()
function output = sub(inputArray)
output = max(inputArray);
% end of function sub()
So in this way you are calling sub function for N number of time and all time it giving you max value which store into new aray Max, so at the end you will get all max values in variable Max.
