how to divide data array into a number of blocks like this using a For Loop?

Question

Ved 2013-11-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/106456-how-to-divide-data-array-into-a-number-of-blocks-like-this-using-a-for-loop

回答： Image Analyst 2013-11-17

Please consider this:

 N=16;
 data=[1:N] % original data array 1xN
 nb=[1,2,4,8] % number of data blocks

output: I want to divide my data (1x16) into different blocks=1,2,4,8 like this:

 % output blocks as nob1,nob2,nob4,nob8
 % nob1 is as it is (1x16)
 % All output blocks have same columns (N=16)

i.e.,

 nob1=[1:16] % no division of data
 nob2=[1 2 3 4 5 6 7 8 0  0  0  0  0  0  0  0
       0 0 0 0 0 0 0 0 9 10 11 12 13 14 15 16]
 nob4=[1 2 3 4 0 0 0 0 0 0  0  0  0  0  0  0
       0 0 0 0 5 6 7 8 0 0  0  0  0  0  0  0
       0 0 0 0 0 0 0 0 9 10 11 12 0  0  0  0
       0 0 0 0 0 0 0 0 0 0  0  0  13 14 15 16]
 nob8=[1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0
       0 0 3 4 0 0 0 0 0 0 0 0 0 0 0 0
       0 0 0 0 5 6 0 0 0 0 0 0 0 0 0 0
       0 0 0 0 0 0 7 8 0 0 0 0 0 0 0 0
       ....
       ....
       0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 16]

Please help me to do so. ( Using a loop for nb=[ 1,2,4,8 ] )

And also the generalized script or function for any value of N (for e.g., N=256 or N=1024)

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Answer 1

Azzi Abdelmalek 2013-11-17

2
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/106456-how-to-divide-data-array-into-a-number-of-blocks-like-this-using-a-for-loop#answer_115473

编辑：Azzi Abdelmalek 2013-11-17

在 MATLAB Online 中打开

N=16
nb=[1 2 4 8]
data=1:N
for k=1:numel(nb)
  ii=nb(k);
  v=zeros(ii,N)
  for p=1:size(v,1)
      idx=(p-1)*N/ii+1:p*N/ii;
      v(p,idx)=data(idx);
  end
  out{k}=v;
end
celldisp(out)