MATLAB: Subtracting 2 matrices of different dimensions

cell arraysmatlab function

a{1}=[1 3 4 5;
      3 3 4 5;
      5 5 4 5
      2 4 2 6;
      6 5 2 6
      7 2 3 1;]
[b,idx]=unique(a{1}(:,3:4),'rows','stable');
uniquematrix{1}=a{1}(idx,:)
1  3  4  5  %Content of uniquematrix{1}
2  4  2  6
7  2  3  1
After a{1}-uniquematrix{1}
3 3 4 5 %My desired output
5 5 4 5
6 5 2 6
Is there a function to directly perform a{1}-uniquematrix{1}?

Best Answer

a=[1 3 4 5;
  3 3 4 5;
  5 5 4 5
  2 4 2 6
  6 5 2 6
  7 2 3 1]
[b,idx]=unique(a(:,3:4),'rows','stable')
out=a(setdiff(1:size(a,1),idx),:)
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