Matrix manipulation using reshape

If A=

     1     0     0     0     0     0     0     0     0     0
     0     2     0     0     0     0     0     0     0     0
     0     0     3     0     0     0     0     0     0     0
     0     0     0     4     0     0     0     0     0     0
     0     0     0     0     5     0     0     0     0     0
     0     0     0     0     0     6     0     0     0     0
     0     0     0     0     0     0     7     0     0     0
     0     0     0     0     0     0     0     8     0     0
     0     0     0     0     0     0     0     0     9     0
     0     0     0     0     0     0     0     0     0    10

I got B =

     1     2     0     0     0     0     0     0     0     0
     1     2     0     0     0     0     0     0     0     0
     0     0     3     4     0     0     0     0     0     0
     0     0     3     4     0     0     0     0     0     0
     0     0     0     0     5     6     0     0     0     0
     0     0     0     0     5     6     0     0     0     0
     0     0     0     0     0     0     7     8     0     0
     0     0     0     0     0     0     7     8     0     0
     0     0     0     0     0     0     0     0     9    10
     0     0     0     0     0     0     0     0     9    10

using

B = reshape(repmat(max(reshape(A,2,[])),2,1),size(A)).

But if i want to get C =

     1     0     3     0     0     0     0     0     0     0
     0     2     0     4     0     0     0     0     0     0
     1     0     3     0     0     0     0     0     0     0
     0     2     0     4     0     0     0     0     0     0
     0     0     0     0     5     0     0     8     0     0
     0     0     0     0     0     6     0     0     9     0
     0     0     0     0     0     0     7     0     0    10
     0     0     0     0     5     0     0     8     0     0
     0     0     0     0     0     6     0     0     9     0
     0     0     0     0     0     0     7     0     0    10

from A how the reshape can be written?

[Roger Stafford]

How would you generalize what is desired for an arbitrary size diagonal matrix? It is fairly easy to produce the desired result for your particular size.

[Prabha Kumaresan]

I need to have random grouping of rows which reults in sharing their values.

Answer 1

[Roger Stafford]

If the "grouping" is to be randomly determined, do this:

n = size(A,1);
p = mod((0:n-1)+randi(n-1,1,n),n)+1; % p(k) never equals k
B = A;
for k = 1:n
  B(p(k),k) = B(k,k);
end

If you have already determined a vector p to be used, then leave out the second line.

[Prabha Kumaresan]

 The following code executes but I am unable to get the random grouping of users. 
 N_UE=[10 20 30 40 50];
  N_SC=[60 70 80 90 100];
  for t= 1:length(N_UE)
  for r = 1:length(N_SC)
  C=rand(N_UE(t),N_SC(r));
  s = size(C,1);
  p = mod((0:s-1)+randi(s-1,1,s),s)+1; % p(k) never equals k
  B = C;
  for k = 1:s
    B(p(k),k) = B(k,k);
  end
  end
  end