Access subarry from large file and loop through each subarry.

Hi all,I have an array A as follows,

 1 65 63 41 
 1 32 1 66
 1 51 453 66
 2 12 12 251
 2 54 544 84
 3 848 484 48
 3 44 484 64
 3 44 646 644
 3 545 4546 454

I want to write a for loop for every subarray if A(i,1) == A(i+1,1)

Like, for loop for each of these cases

 A(1:3,:)
 A(4:5,:)
 A(6:10,:)

Any help is appreciated thanks.

Answer 1

[Andrei Bobrov]

A_out = accumarray(A(:,1),(1:size(A,1))',[],@(x){A(x,:)});

other:

b = unique(A(:,1));
n = numel(b);
A_out = cell(n,1);
for ii = 1:n
    A_out{ii} = A(A(:,1) == b(ii),:);
end

[dipak sanap]

Hey, thanks, it worked !!!