MATLAB: How to compare rows from two arrays and delete the different column

compare arraydelete array

Hello Everyone,
if true
  % code


end
I have two array Arr1 = 1  2  6
                        2  4  8
                        5  6  4
                        8  1  10
if true
  % code
endand I have another Arr2 = 1  2  3
                             2  3  4
                             5  6  7
                             8  9  10
                             11 12 13
I want to remove the common elements from both arrays
so my result should look like
if true
  % code
end              Arr1 = 1  2  6
                        5  6  4
                 Arr2 = 1  2  3
                        5  6  7
How can I solve this problem

Best Answer

Maybe use ismember() with the rows option:
Arr1 = [1  2  6;
  2  4  8;
  5  6  4;
  8  1  10]
Arr2 = [1  2  3;
  2  3  4;
  5  6  7;
  8  9  10;
  11 12 13]
[ia, ib] = ismember(Arr1(:, 1:2), Arr2(:, 1:2), 'rows')
Arr1 = Arr1(ia, :)
Arr2 = Arr2(ia, :)
You'll see in the command window:
ia =
  4×1 logical array
   1
   0
   1
   0
ib =
     1
     0
     3
     0
Arr1 =
     1     2     6
     5     6     4
Arr2 =
     1     2     3
     5     6     7
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