how to find the closest vector to a given vector in matlab?

Question

I have a set of n-dimensional representative vectors in matlab. I have to group vectors from a set of training vectors to groups represented by representative vectors based on proximity. How should I do it?

Answer 1

You can use dsearchn to find which representative is closest to each point. I would recommend trying the version that doesn't involve a triangulation matrix first. If the memory or CPU performance isn't good enough, look into the triangulation stuff.