Add indicative labels to vector values

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;
    2 1;
    3 1;
    4 0;
    5 0; 
    6 0];

Any help would be appreicted.

Answer 1

[David Hill]

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

Answer 2

[Chunru]

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

Answer 3

[Stephen23]

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