hi,,,lets say I have a 3*4 matrix.. I want to add row-wise elements. How can I do that? TIA

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nafila aytija 2016-5-13

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编辑： John BG 2016-5-14

采纳的回答： John BG

example : A=[1 0 1 0 ; 0 1 0 0 ; 1 1 1 0];

How can I add the elements row wise?

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Answer 1

John BG 2016-5-13

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在 MATLAB Online 中打开

bsxfun(@xor,A,A)

does not have index to point operation along a given matrix dimension, bsxfun(@xor,A,A,2) doesn't work.

However, for vertical xor you can do:

[sz1 sz2]=size(A)
B=xor(A(1,:),A(2,:));for k=2:1:sz1-1 B=xor(B,A(k+1,:));  end

and horizontal xor:

[sz1 sz2]=size(A)
B=xor(A(:,1),A(:,2));for k=2:1:sz2-1 B=xor(B,A(:,k+1));  end

1 is vertical, 2 is horizontal

Perhaps you are going to repeat these operations, you may want to turn these 2 into a single function with input the dimension to calculate xor along.

In case you don't know how to, just ask as comment in this question and I'll have a look.

If you find this answer of any help solving your question,

please click on the thumbs-up vote link,

thanks in advance

John

jgb2012@sky.com

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John BG 2016-5-14

在 MATLAB Online 中打开

a start point to develop the function you want could be the following:

function A_xor=auto_xor(A,n)
% n can be 1: xor horizontally, all columns
%       or 2: xor vertically, all rows
[sz1 sz2]=size(A);
switch n  
    case 2
        A_xor=xor(A(1,:),A(2,:));
        for k=2:1:sz1-1 
            A_xor=xor(A_xor,A(k+1,:));  
        end
      case 1
          A_xor=xor(A(:,1),A(:,2));
          for k=2:1:sz2-1 
                  A_xor=xor(A_xor,A(:,k+1));  
          end
      otherwise
          % display something with 'error' and break
end
end