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

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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.

Akzeptierte Antwort

KSSV
KSSV am 19 Mai 2021
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,:)
  3 Kommentare
KSSV
KSSV am 24 Mai 2021
You have it caluclated from the function already..... C1 is the array you want.
Yro
Yro am 24 Mai 2021
Thank you very much for your help.
Best regards.

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Matt J
Matt J am 24 Mai 2021
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

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