MATLAB: Eliminating rows that are exact duplicates (unique eliminates some desired combinations!)

matlab function

Hey there

If I have a matrix A = [-1 -1 0; -1 -1 0; 0 -1 -1; -1 0 -1] how do I eliminate the row that is an exact repetition of a row i.e I want to eliminate the row -1 -1 0 but keep all the other iterations of this: 0 -1 -1 and -1 0 -1 should remain in the matrix.

The unique function eliminates these other possibilities!

Thanks

Best Answer

unique(A,'rows','stable')

Related Solutions

MATLAB: How to find which rows are identical in a matrix

>> A = [1 1 1 1; 1 0 0 1; 1 0 0 1; 1 0 0 0];
>> [~,B,C] = unique(A,'rows');
>> A(B(accumarray(C,1)>1),:)
ans =
   1   0   0   1

MATLAB: ‘combnk’ enumeration of combinations

>> [X,Y,Z] = ndgrid([-1,0,1]);
>> M = [Z(:),Y(:),X(:)]
M =
  -1  -1  -1
  -1  -1   0
  -1  -1   1
  -1   0  -1
  -1   0   0
  -1   0   1
  -1   1  -1
  -1   1   0
  -1   1   1
   0  -1  -1
   0  -1   0
   0  -1   1
   0   0  -1
   0   0   0
   0   0   1
   0   1  -1
   0   1   0
   0   1   1
   1  -1  -1
   1  -1   0
   1  -1   1
   1   0  -1
   1   0   0
   1   0   1
   1   1  -1
   1   1   0
   1   1   1

Best Answer

Related Solutions

MATLAB: How to find which rows are identical in a matrix

MATLAB: ‘combnk’ enumeration of combinations

Related Question