Adding all the rows of a matrix

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Khadija Khan 2018-4-11

0
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https://ww2.mathworks.cn/matlabcentral/answers/394238-adding-all-the-rows-of-a-matrix

回答： Khadija Khan 2018-4-11

I have a matrix A=[1 0 3 0 0; 0 1 0 1 0]; I have B=sum(A); B=[1 1 3 1 0]; After performing some operation on this matrix B let my matrix B is B=[0.1 0.1 0.25 0.1 0], How can I get back A=[0.1 0 0.25 0 0; 0 0.1 0 0.1 0]. Note: This operation can only be performed on Matrix B. Can anybody help? Thanks in advance

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Rik 2018-4-11

Have you seen what you posted? It is unreadable. Select the code you have in your comment and click the {}Code button.

And if you have working code, what is your question?

Khadija Khan 2018-4-11

编辑：Khadija Khan 2018-4-11

在 MATLAB Online 中打开

I solved it Thank you so much Rik Wisselink

Q=20;

Kr=2;

Kt=3;

A=[10 0 0 ; 0 22 0];

 B=sum(A);
 if (sum(B(1,:)) > Q)
                sorted_matrix  = sort(B(1,:),'descend');
                N_tilde = size(sorted_matrix,2);
                sorted_matrix(end+1) = -Inf;
                while(N_tilde > 0)
                    if ((sorted_matrix(N_tilde) > sorted_matrix(N_tilde+1)) && ...
                            (sorted_matrix(N_tilde) > (sum(sorted_matrix(1:N_tilde))-Q)/N_tilde))
                        mu = (sum(sorted_matrix(1:N_tilde))-Q)/N_tilde;
                       B(1,:) = max(B(1,:) - mu, 0);
                        break;
                    else
                        N_tilde = N_tilde - 1;
                    end
                end
end
 A_temp=zeros(Kr,Kt);
for row=1:Kr
    for col=1:Kt
if A(row,col)>0
    A_temp(row,col)=1;
else
    A_temp(row,col)=A(row,col);
end
    end
end
A_final=zeros(Kr,Kt);
for r=1:Kr    
A_final(r,:)=A_temp(r,:).*B;    
end