repeat elements in matrix

how can i generate a matrix as shown [1 1 1 1 1 1 1 1; 1 1 1 1 2 2 2 2; 1 1 2 2 3 3 4 4; 1 2 3 4 5 6 7 8]

Answer 1

[Azzi Abdelmalek]

m=4;
n=2^(m-1);
b=zeros(m,n);
for k=0:m-1
  a=1:2^k;
  b(k+1,:)=reshape(repmat(a,n/numel(a),1),1,[]);
end
b

Or

m=4
n=2^(m-1)
b=cell2mat(arrayfun(@(x)  reshape(repmat(1:2^x,n/numel(1:2^x),1),1,[]),(0:m-1)','un',0))

[ali sedeek]

thanks

[Image Analyst]

What was wrong with

m =  [1 1 1 1 1 1 1 1; 1 1 1 1 2 2 2 2; 1 1 2 2 3 3 4 4; 1 2 3 4 5 6 7 8];

It generates exactly what you asked for without assuming anything that you did not state. If you have some pattern, or generality in terms of size of dimensions, then you should have stated what it is.