how to split 6x4 double based on first columns values into three [2X4]?

4 1 2 3

4 5 6 7

5 1 2 3

5 4 5 6 ====>> [4 1 2 3 [ 5 1 2 3 [6 1 2 3

5 4 5 6

5 4 5 6 4 5 6 7] 5 4 5 6] 6 4 5 6]

6 1 2 3

6 4 5 6

Answer 1

[Matt J]

A=[4 1 2 3
4 5 6 7
5 1 2 3
5 4 5 6 
5 4 5 6
5 4 5 6 
6 1 2 3
6 4 5 6];

A=unique(A,'rows');
Acell=splitapply(@(x){x}, A,findgroups(A(:,1)));

Acell{:}

ans = 2×4

4 1 2 3 4 5 6 7

ans = 2×4

5 1 2 3 5 4 5 6

ans = 2×4

6 1 2 3 6 4 5 6

Answer 2

[Matt J]

A=randi(9,6,4)

A = 6×4

6 1 9 7 8 5 8 9 9 7 9 9 6 4 1 4 6 7 7 9 3 8 1 2

Acell=mat2tiles(A,[2,4]); %get mat2tiles from https://www.mathworks.com/matlabcentral/fileexchange/35085-mat2tiles-divide-array-into-equal-sized-sub-arrays

Acell{:}

ans = 2×4

6 1 9 7 8 5 8 9

ans = 2×4

9 7 9 9 6 4 1 4

ans = 2×4

6 7 7 9 3 8 1 2

[MS]

Thanks @Matt J sorry for the mis commmunciation. if you see the three splitted/grouped matrices are based on the fitst column values. I mean, it should be grouped based on the first column values such as 4, 5, 6.

All matrices should be grouped based on the first column values. 1, all matcies with 4 should be sperate matrix 2, all matrix with 5 should be sperate matrix 3, all matcies with 6should be sperate matrix etc.,

my matrix is not random.