MATLAB: How rearrange data in a matrix

for loopMATLABmatrix manipulation

I have a data as:
 data=[1 2 3 4 5 6 7 8];
I need a new data matrix (4 x 8),like this:
 new_data =[ 1 2 0 0 0 0 0 0
             0 0 3 4 0 0 0 0
             0 0 0 0 5 6 0 0
             0 0 0 0 0 0 7 8 ]
How to do it using a FOR loop ? Any help?

Best Answer

data=[1 2 3 4 5 6 7 8];
n=numel(data);
R=zeros(n/2,n);
R(:,1:2)=reshape(data,2,[])';
out=cell2mat(arrayfun(@(x) circshift(R(x+1,:),[ 0 2*x]),(0:3)','un',0))
%or
data=[1 2 3 4 5 6 7 8];
n=numel(data);
out=zeros(n/2,n);
out(sub2ind(size(out),repmat((1:n/2),2,1),reshape(1:n,2,[])))=data
%or
EDIT
n=numel(data);
a=[reshape(data,2,[]) ;zeros(n,n/2)];
a=a(:);
a(end-n+1:end)=[];
out=reshape(a,n,n/2)'
Related Question