MATLAB: How to find a specific row in a matrix and eliminate it

Question

Hi everyone, I have a matrix such as this: D0=[1 2;1 4;2 1;3 5;4 1;5 3]. I need to eliminate one of the two rows with same elements. for example, 1 & 2 both involve in rows one and three, so I need to eliminate one of these rows. can any one please help me?

Answer 1

It looks like you don't care about the ordering of the columns. In that case, it's extremely simple: a) sort the rows (so that [2 1] becomes [1 2]) and b) use unique to remove duplicates

D0 = [1 2;1 4;2 1;3 5;4 1;5 3]
uniquerows = unique(sort(D0, 2), 'rows', 'stable') 
%if you don't care about the rows ordering you can omit the 'stable'