The size of my final matrix is wrong in a nested loop

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Andromeda 2022-4-2

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https://ww2.mathworks.cn/matlabcentral/answers/1687239-the-size-of-my-final-matrix-is-wrong-in-a-nested-loop

评论： Stephen23 2022-4-3

I am matching the first element in my matrix to each element in the matrix excluding itself, row to second column element to last. The final size of the resulting matrix is [1 2] instead of [7 2]. How do I fix this? I want a final size of [7 2]. Any help will be much appreciated

A = [1 2 3 4 5 6 7 8];
for c = 1:1:size(A,1)
    
    row1 = A(c, 1);
    
    for k = 2:1:size(A, 2)
        
        columns = A(c, k);
        
        Final = [row1 columns];
        
        disp(size(Final))
    end
end

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采纳的回答

Voss 2022-4-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1687239-the-size-of-my-final-matrix-is-wrong-in-a-nested-loop#answer_933229

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Is this what you want to do?

A = [1 2 3 4 5 6 7 8];
for c = 1:1:size(A,1)
    
    row1 = A(c, 1);
    
    Final = [];
    
    for k = 2:1:size(A, 2)
        
        columns = A(c, k);
        
        Final = [Final; row1 columns];
        
        disp(size(Final));
        
    end
    
end
     1     2

     2     2

     3     2

     4     2

     5     2

     6     2

     7     2
disp(Final);
     1     2
     1     3
     1     4
     1     5
     1     6
     1     7
     1     8