MATLAB: Unique rows with nan

Question

If i have two identical rows

for example: A=[ 1 2 3 NaN;1 2 3 NaN];

using

unique(A,'rows') is not eliminating the duplication. is there any other method to do so?

Answer 1

This is because nan~=nan is always true.

So one approach is to replace nan with some other value.

A(isnan(A)) = inf;
B = unique(A,'rows');
B(isinf(B)) = nan

If you have infs in your array as well as nans, pick some other value.