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

6 views (last 30 days)
NA on 8 Feb 2022
Edited: Turlough Hughes on 8 Feb 2022
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))

Turlough Hughes on 8 Feb 2022
Edited: Turlough Hughes on 8 Feb 2022
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.

### Categories

Find more on Matrix Indexing in Help Center and File Exchange

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by