Find unique values of a vector with same order as in the vector in matlab

Question

I have a vector A=[2,5,6,2,4,13,34,3,34]. I want to find a unique value of this vector but not in sorted order! I searched in Matlab site and I found this function

Answer 1

Assuming you have a vector (so the 'rows' version makes no sense), here's a solution based on bsxfun:

[~, ind] = max(bsxfun(@eq, A, A.'));
ind = ind(ind>=1:numel(ind));
C = A(ind);

How it works: Do all pairwise comparisons between elements (bsxfun(@eq, A, A.')). For each element, find the index of the first equal element ([~, ind]=max(...)). If that index is smaller than the current position (that is, if there's a previous element which is equal to the current one), disregard it (ind = ind(ind>=...). Use the surviving indices to generate the result (C = A(ind)).