Coud anyone help me to solve the issue.
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I am having a matrix
A=[3.5204 3.7294 3.9112 4.0754 4.2294 4.3787;
0 0 0 0 0 0;
0 0 0 0 0 0;
0 0 0 0 0 0;
0.4337 0.4255 0.4162 0.4065 0.3967 0.3871]
i want to rearrange the matrix in such a way that the sum of (A,1) and sum of (A,2) should not be equal to zero.
Also the number of non zero values present in each row or column can be more than one.
3 Comments
madhan ravi
on 2 Aug 2019
madhan ravi:
A(~sum(A,2),:)=[];
A(:,~sum(A,1))=[]
jaah navi:
I want to have the output in the following manner
A=[3.5204 0 3.9112 0 0 0;
0 0 0 4.0754 0 0.3871;
0 3.7294 0 0 0.3967 0;
0.4337 0 0.4162 0 4.2294 4.3787;
0 0.4255 0 0.4065 0 0]
madhan ravi:
Mind explaining in which logic they are rearranged??
Accepted Answer
Andrei Bobrov
on 2 Aug 2019
Edited: Andrei Bobrov
on 2 Aug 2019
One variant:
[m,n] = size(A);
[~,ii] = sort(rand(m-1,n));
B = A(2:end,:);
An = [A(1,:);B(ii + (m-1)*(0:n-1))];% ATTENTION! If MATLAB < R2016b then use: An = [A(1,:);B(bsxfun(@plus,ii,(m-1)*(0:n-1)))];
jj = mod((1:m)' - (1:n),m) + 1; % for MATLAB < R2016b: jj = mod(bsxfun(@minus,(1:m)',1:n),m) + 1;
jj = jj(:,randperm(n));
out = An(sub2ind([m,n],jj,repmat(1:n,m,1)));
general case:
[m,n] = size(A);
[k,f] = max([m,n]);
p = numel(A);
V = A(randperm(p));
ii = find(V ~= 0, k, 'first');
W = [V(ii),V(setdiff(1:p,ii))];
M = reshape(W,k,[]);
if f == 1
t = n;
else
t = m;
end
MM = M(k*mod((1:t) - (1:k)',t) + (1:k)');% ATTENTION! If MATLAB < R2016b then use: MM = M(k*mod(bsxfun(@minus,1:t,(1:k)'),t) + (1:k)');
out = MM(randperm(k),:);
if f == 2
out = out';
end
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