Find repeated values in an array, by column and rows (unique function).

Hi, I want to find the repeated vectors in an array where I have n columns and m rows. For example in the following array:

ARRAY = [
9.04828	8.80036 ...
9.04828	8.80036 ...
9.11259	8.74653 ...
9.04828	8.80036 ...
9.24358	8.74653 ...
8.9823	9.05449 ...
9.02563	8.24793 ...
7.5415	8.94942 ...
7.28989	8.81836 ...
...
]

I want to find the repeated vectors (x1, x2), which are repeated in rows 1, 2 and 4. Using the unique function, I can get the repeated value by defining:

[C1, ia1, ic1] = unique(A(:,1),'stable', 'rows');

but only by columns. How can I get the vector that repeats?

Thanks in advance.

Answer 1

[KSSV]

A = [9.04828	8.80036 ;
9.04828	8.80036 ;
9.11259	8.74653 ;
9.04828	8.80036 ;
9.24358	8.74653 ;
8.9823	9.05449 ;
9.02563	8.24793 ;
7.5415	8.94942 ;
7.28989	8.81836 ] ;

[C1, ia1, ic1] = unique(A,'stable', 'rows');
A(ic1==1,:)

[Yro]

Hi KSSV, it works, now knowing that there are repeated values, how can I remove it from the initial array, leaving only one?

Thanks in advance.

[KSSV]

You have it caluclated from the function already..... C1 is the array you want.

[Yro]

Thank you very much for your help.

Best regards.

Answer 2

[Matt J]

A = [9.04828	8.80036 ;
9.04828	8.80036 ;
9.11259	8.74653 ;
9.04828	8.80036 ;
9.24358	8.74653 ;
8.9823	9.05449 ;
9.02563	8.24793 ;
7.5415	8.94942 ;
7.28989	8.81836 ] ;

C=num2cell(A,1);

[G,ID{1:2}]=findgroups(C{:});

ID=cell2mat(ID)

ID = 7×2

7.2899 8.8184 7.5415 8.9494 8.9823 9.0545 9.0256 8.2479 9.0483 8.8004 9.1126 8.7465 9.2436 8.7465