find how many times same element is repeated

Question

NA 2019-4-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/454355-find-how-many-times-same-element-is-repeated

评论： madhan ravi 2019-4-4

A=[9,8;7,6;1,2;2,4;3,4;3,4;4,7;6,7;8,6;9,8;7,6];
a = sort(unique(A,'rows'),2);

a is [1,2;2,4;3,4;4,7;6,7;6,7;6,8;8,9];

I want to get how many times same element is repeated,

[1,2] repeated 1,[2,4] repeated 1, [3,4] repeated 2, [1,2] repeated 1, [4,7] repeated 1, [6,7] repeated 2

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madhan ravi 2019-4-4

Note you have a mistake in your desired result 6,7 has repeated once and 7,6 has repeated twice.

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Answer 1

madhan ravi 2019-4-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/454355-find-how-many-times-same-element-is-repeated#answer_369030

编辑：madhan ravi 2019-4-4

在 MATLAB Online 中打开

A=[9,8;7,6;1,2;2,4;3,4;3,4;4,7;6,7;8,6;9,8;7,6];
a = unique(A,'rows');
R = zeros(size(a,1),1);
for k = 1:size(a,1)
    R(k) = nnz(ismember(A,a(k,:),'rows'));
end
Result = table(a,R,'VariableNames',{'Rows','Times'})

Gives:

Result =
  8×2 table
     Rows     Times
    ______    _____
    1    2      1  
    2    4      1  
    3    4      2  
    4    7      1  
    6    7      1  
    7    6      2  
    8    6      1  
    9    8      2  
>> 