Find and remove equal element in 2 different cell with different size

Question

NA 2022-2-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1645440-find-and-remove-equal-element-in-2-different-cell-with-different-size

编辑： Turlough Hughes 2022-2-8

I have cell A and B.

A = {[100,103,104],[4,5,11],[66],[4,5,1],[85,88,89,77]};
B = {[40,41,41],[4,5,11],[68],[85,88,89,77],[31,66],[1,9,8,7,5],[100,103,104]};

I want to find equal cell in A and B and then remove it form both cell.

Result should be

same_cell = {[100,103,104],[4,5,11],[85,88,89,77]}
New_A = {[4,5,11],[66],[4,5,1]}
New_B = {[40,41,41],[68],[31,66],[1,9,8,7,5]}

I tried isequal but A and B are different in size.

find(cellfun(@isequal, A, B))

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Answer 1

Turlough Hughes 2022-2-8

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1645440-find-and-remove-equal-element-in-2-different-cell-with-different-size#answer_891215

编辑：Turlough Hughes 2022-2-8

在 MATLAB Online 中打开

% Your sample data
A = {[100,103,104],[4,5,11],[66],[4,5,1],[85,88,89,77]};
B = {[40,41,41],[4,5,11],[68],[85,88,89,77],[31,66],[1,9,8,7,5],[100,103,104]};

You could do the following

idx = cellfun(@(a) cellfun(@(b) isequal(a,b),B), A,'uni',0);
idx = vertcat(idx{:});
same_cell = A(any(idx,2))
same_cell = 1×3 cell array
    {[100 103 104]}    {[4 5 11]}    {[85 88 89 77]}
New_A = A(~any(idx,2))
New_B = 1×2 cell array
    {[66]}    {[4 5 1]}
New_B = B(~any(idx,1))
New_A = 1×4 cell array
    {[40 41 41]}    {[68]}    {[31 66]}    {[1 9 8 7 5]}

The rows in idx correspond to A and the columns in idx correspond to B. More specifically, rows in idx which contain a 1 corresponds to a cell in A which matched with B, so you can index A(~any(idx,2)) to obtain the non matching cells. Similarly, columns in idx which contain a 1 correspond to a cell in B which matched with A, hence B(~any(idx,1)) gives the non matching cells in B.