Add indicative labels to vector values

Question

Lama Hamadeh ，2022-10-12

0
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Direct link to this question

https://ww2.mathworks.cn/matlabcentral/answers/1823913-add-indicative-labels-to-vector-values

回答： Stephen23 ，2022-10-12

Hi,

If I have two vectors:

A1 = [ 1 ; 2 ; 3 ];
A2 = [ 4 ; 5 ; 6 ];

Concatenating these two vectors gives:

A = [A1 ; A2];

I want to add another column to this vetoc that represents indicative binary labels, mainly either 0 or 1, so that I know from which vector this element corresponds to, i.e., I need to produce something like the following

A_labeled = [1 1;
1;
1;
0;
0; 
0];

Any help would be appreicted.

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Answer 1

David Hill 2022-10-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1823913-add-indicative-labels-to-vector-values#answer_1072723

A1 = [ 1 ; 2 ; 3 ];
A2 = [ 4 ; 5 ; 6 ];
A_labeled=[A1,ones(size(A1));A2,zeros(size(A2))]
A_labeled = 6×2
     1     1
     2     1
     3     1
     4     0
     5     0
     6     0

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Answer 2

Chunru 2022-10-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1823913-add-indicative-labels-to-vector-values#answer_1072728

A1 = [ 1 ; 2 ; 3 ];
A2 = [ 4 ; 5 ; 6 ];
A_labeled = [A1 ones(size(A1)); A2 zeros(size(A2))]
A_labeled = 6×2
     1     1
     2     1
     3     1
     4     0
     5     0
     6     0

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Answer 3

Stephen23 2022-10-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1823913-add-indicative-labels-to-vector-values#answer_1072733

A1 = [1;2;3];
A2 = [4;5;6];
A1(:,2) = 0;
A2(:,2) = 1;
A = [A1;A2]
A = 6×2
     1     0
     2     0
     3     0
     4     1
     5     1
     6     1