How do I create a 1x21 matrix where the inputs are all the different values of d

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Romina 2019-9-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/480376-how-do-i-create-a-1x21-matrix-where-the-inputs-are-all-the-different-values-of-d

评论： the cyclist 2019-9-14

B=[1 2 3 4 5 6 7; 9 11 13 15 17 19 21];
for i=1:7
    for j=1:7
        if i>j
P=B(:,i);
Q=B(:,j);
Norm=zeros(1,nchoosek(7,2));
d=norm(P-Q)
k=1:nchoosek(7,2);
Norm(:,k)=d
        end
    end
end

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the cyclist 2019-9-14

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https://ww2.mathworks.cn/matlabcentral/answers/480376-how-do-i-create-a-1x21-matrix-where-the-inputs-are-all-the-different-values-of-d#answer_391846

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Does this code do what you had intended? (There was some guesswork on my part.)

B=[1 2 3 4 5 6 7; 9 11 13 15 17 19 21];
Norm=zeros(1,nchoosek(7,2));
k = 0;
for i=1:7
for j=1:7
    if i>j
        k = k+1;
        Norm(k) = norm(B(:,i)-B(:,j));
    end
end
end