MATLAB: Deleting duplicate rows and keeping zero rows

Question

Hi! I need a help!

A=[1 2;
   3 4; 
   0 0;
   1 2; 
   5 6; 
   0 0]

How can i delete duplicate rows, without deleting zero rows? I want my new matrix to look like that:

A=[1 2;
   3 4; 
   0 0; 
   5 6; 
   0 0]

Thank you very much! 😉

Answer 1

A=[1 2;
   3 4;
   0 0;
   1 2;
   5 6;
   0 0]
X = ~any(A,2)
[~,Y] = unique(A(~X,:),'rows','stable')
Z = X(~X)
Z(Y) = true
X(~X) = Z
B = A(X,:)

creates this:

B =
   1     2
   3     4
   0     0
   5     6
   0     0