Time averaged values for each 100 iteration

i want to calculate the time averged value for each 100 iteration. knowing that my program is like this :

for m = 1:20000  %time iteration
for k = 1:1000
X(k)=
end(k)

if m>10000
    %here i want to calculate the aceraged valu of X but for each 100 itaetation (m) i want to store the Xaveraged
    for k = 1:1000
    Xaveraged(k)=Xaveraged(k) + X(k)
    end
end

end(m)

Answer 1

[Matt J]

Xaveraged=mean(reshape(X,100,[]));

[m m]

thank you Matt for your rely.

but i dont intersttand Xaveraged=mean(reshape(X,100,[])); because Xaveraged depends on K, i want for each 100 m iteration store the values of Xaveraged in each K.

Answer 2

[Matt J]

Maybe this is what you want.

X=nan(1000,20000); %pre-allocate

for m = 1:20000  %time iteration
  for k = 1:1000 
    X(k,m)=... %store for all k and m
  end
end

%compute after iterations all finished
Xaveraged=squeeze(  mean(reshape(X,1000,100,[]),2) ); 

[Matt J]

Or, if you want to be more conservative with memory (but why??), then a variation is

X=nan(1000,100);         %pre-allocate
Xaveraged=nan(1000,200); %pre-allocate

for s=1:200
  for t=1:100  
   

     m=s*t; % time iteration number
 
      for k = 1:1000 
        X(k,t)=...
      end
        
  end

  Xaveraged(:,s)=mean(X,2);

end