To remove duplicated matrices in different cell...

first, let me describe my situation for following example.

cell {1} = [1 2 3 4;5 6 7 8]

cell {2} = [1 1 1 1;1 2 3 4]

cell {3} = [5 6 7 8;2 2 2 2]

I would like to know whether [1 2 3 4] of cell 1 is in other cells. In this example, it exists in cell{2}.

similary, I alse wonder [5 6 7 8] of cell 1 exists in other cells in the same way.

In breif, I wonder there is a fuction searching for a specific matrix in each cell.

And if it is possible, I want to remove these matrices in each cell.

So, I want results as follows.

cell 1 = [1 2 3 4;5 6 7 8]

cell 2 = [1 1 1 1]

cell 3 = [2 2 2 2]

Is it possible? What should I do? help me, plz.

Answer 1

[Andrei Bobrov]

c = {[1 2 3 4;5 6 7 8];
[1 1 1 1;1 2 3 4];
[5 6 7 8;2 2 2 2]};
n = cellfun('size',c,1);
C = cat(1,c{:});
[~, b] = unique(C,'rows','first');
y =mat2cell(ismember((1:size(C,1))',b),n,1);
out = cellfun(@(x,y)x(y,:),c,y,'un',0)

add use loop for

n = numel(c);
for j1 = 1:n-1
    for j2 = j1+1:n
        c{j2} = c{j2}(~ismember(c{j2},c{j1},'rows'),:);
    end
end

[park minah]

andrei, thank you.

but I want not to use "cat".

because size of cell{1},cell{2} and cell{3} are actually very massive.

That is the reason why each matrix is stored by type of cell.

There is no way not to include "cat"?

[Andrei Bobrov]

see 'add'