How can I average pairs of numbers within a vector?

I have two for loops here, and my output vector isn't quite what I need. How can I average two values within this loop?

deg= [-20,-175,-15,-125,-10,-5,0,5,10];
run= [1,2];

n=1;
for i= 1:length(deg)
    for ii=1:length(run)
    %
        filename= ['q',num2str(deg(i)),'deg_2winglet_run',num2str(run(ii)),'.mat'];
        temp= load(filename);
        Fz(n)=mean(temp.F(:,3));
        n=n+1;
    end
end

Right now I am outputting a vector of the form [1_run1,1_run2,2_run1,2_run2,...] and I want to average the runs. I want the output vector to become [(1_run1)+(1_run2)/2, (2_run1)+(2_run2)/2, ...]. Is there a way to put this inside the for loops?

[per isakson]

After reading only the title

>> vec = (1:12)
vec =
     1     2     3     4     5     6     7     8     9    10    11    12
>> vec = reshape( vec, 2,[] )
vec =
     1     3     5     7     9    11
     2     4     6     8    10    12
>> mean( vec, 1 )
ans =
    1.5000    3.5000    5.5000    7.5000    9.5000   11.5000
>>

[Josh Huang]

wow, thanks! really appreciate it

Answer 1

[Aarti Soni]

What if the data is three dimensional?

for example: latitute X longitute X 60

how to take average in pair to make it latitute X longitute X 30?