MATLAB: How to find unique pages in a 3d matrix

Question

If I have 3d matrix like

    A = cat(3, [1 2; 3 4], [5 6; 3 4], [5 6; 1 2],[1 2; 3 4])

I want to find unique pages in this matrix so the result should be

   result = cat(3, [1 2; 3 4], [5 6; 3 4], [5 6; 1 2])

Answer 1

A = cat(3, [1 2; 3 4;0 0], [5 6; 3 4; 0 0], [5 6; 1 2;0 0],[1 2; 3 4;0 0])
[n,m,p]=size(A)
a=reshape(A,n,[],1)
b=reshape(a(:),n*m,[])'
c=unique(b,'rows','stable')'
reshape(c,n,m,[])