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sharing of numbers in the matrix

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Prabha Kumaresan
Prabha Kumaresan 2017-12-15
编辑： Andrei Bobrov 2017-12-15
If
A=[0.1 0 0.2 0 0 0 0 0;0 0 0 0.3 0.4 0 0 0;0 0.5 0 0 0 0 0 0.6;0 0 0 0 0 0.7 0.8 0]
I want to have
B=[0.1 0 0.2 0.3 0.4 0 0 0;0.1 0 0.2 0.3 0.4 0 0 0;0 0.5 0 0 0 0 0.7 0.8 0.6;0 0.5 0 0 0 0 0.7 0.8 0.6]
could anyone tell me how to get it?
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Prabha Kumaresan
Prabha Kumaresan 2017-12-15
A is a matrix of subcarrier allocation to users,where rows denote users and columns denote subcarriers.B(2,2) is 0 which means subcarrier is not being used by user1 and user2.
Jos (10584)
Jos (10584) 2017-12-15
I am completely lost ... Stephen and Andrei, the floor is yours

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回答（2 个）

Stephen23
Stephen23 2017-12-15
编辑：Stephen23 2017-12-15
Solution to your original question:
>> reshape(repmat(max(reshape(A,2,[])),2,1),size(A))
ans =
0.10000 0.00000 0.20000 0.30000 0.40000 0.00000 0.00000 0.00000
0.10000 0.00000 0.20000 0.30000 0.40000 0.00000 0.00000 0.00000
0.00000 0.50000 0.00000 0.00000 0.00000 0.70000 0.80000 0.60000
0.00000 0.50000 0.00000 0.00000 0.00000 0.70000 0.80000 0.60000
Solution to your later comment:
>> repmat(reshape(max(reshape(A,2,[])),2,[]),2,1)
ans =
0.10000 0.00000 0.20000 0.30000 0.40000 0.00000 0.00000 0.00000
0.00000 0.50000 0.00000 0.00000 0.00000 0.70000 0.80000 0.60000
0.10000 0.00000 0.20000 0.30000 0.40000 0.00000 0.00000 0.00000
0.00000 0.50000 0.00000 0.00000 0.00000 0.70000 0.80000 0.60000
Andrei Bobrov
Andrei Bobrov 2017-12-15
编辑：Andrei Bobrov 2017-12-15
out = repelem(squeeze(max(permute(reshape(A,2,2,[]),[1,3,2]))),1,2)';
or
out = A;
[ii,jj] = find(A);
t = rem(ii,2);
out(sub2ind(size(out),ii - ~t + t,jj)) = A(A>0);
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Prabha Kumaresan
Prabha Kumaresan 2017-12-15
If i need to have B such that B =
0.1000 0.5000 0.2000 0 0 0 0 0.6000
0 0 0 0.3000 0.4000 0.7000 0.8000 0
0.1000 0.5000 0.2000 0 0 0 0 0.6000
0 0 0 0.3000 0.4000 0.7000 0.8000 0
how it can be done.
Andrei Bobrov
Andrei Bobrov 2017-12-15
编辑：Andrei Bobrov 2017-12-15
See Stephen's answer (first part).
B = reshape(repmat(max(reshape(A,2,2,[]),[],2),1,2),size(A));
or
[ii,jj] = find(A);
B = A;
B(sub2ind(size(A),rem(ii + 1,4)+1,jj)) = A(A>0);

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