MATLAB: Q matrices element matching

Question

i have a matrix like

A=[1 2 3 4 5;

1 2 3 4 6

1 3 4 5 8];

i want a output like X=[1 2 3 4 0]

i.e. i need the common element in the particular coloumn if there is no particular coloum result must b zero

Answer 1

X = zeros(1, size(A,2));
mask = A(1,:) == A(2,:) | A(1,:) == A(3,:);
X(mask) = A(1,mask);
mask = A(2,:) == A(3,:);
X(mask) = A(2,mask);