average column data from multiple files

example

in file a, data is [1 , 2, 3; 4,5,6]

file b, data is  [4,5, 6; 7,8,9]

average=0.5 (a+b)

matlab code

n=;

a=[];

b=[];

c=[];

% for loop

for i=:n

    filename=sprintf('output_%d.dat',i);

    fileinfo = importdata(filename);

    ux=fileinfo.data(:,);   % extract column data

    uy=fileinfo.data(:,);

    uz=fileinfo.data(:,);

    a=[a,ux];   % put all Ux in an array

    b=[b,uy];

    c=[c,uz];

end

aver_Ux=sum(a,)/n;  % sum of array elements

aver_Uy=sum(b,)/n;

aver_Uz=sum(c,)/n;