Given a vector, how to pair them by nearest?
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Hi,
I have a vector with values. I have to pair them by nearest.
Is there any magic command to do it?
Thanks!
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Accepted Answer
Sean de Wolski
on 25 Feb 2013
Edited: Sean de Wolski
on 25 Feb 2013
doc knnsearch
If you have the Statistics Toolbox this sounds like your magic command.
Of course, if you just need a magic command, you can always run:
magic(5)
More Using knnsearch here is probably overkill when you could just use a for-loop, finding the minimum of the exclusive set. But here is how I would do this with knnsearch:
[idx,D] = knnsearch(values',values','K',2) %Get two because the first will be the value itself
idx(:,2) %2nd column is the closest one that isn't the same
D(:,2) %Distance
values(idx(:,2)) %What was the original value?
7 Comments
Teja Muppirala
on 25 Feb 2013
Assuming an even number of elements, isn't the answer just SORTing the vector and taking two at a time?
values = [1.5 0.6 1.9 0.4 1.3 0.1];
reshape(sort(values),2,[])'
More Answers (1)
Jos (10584)
on 25 Feb 2013
What do you mean by ' pair them by nearest '? Do you want to SORT the values?
Otherwise, can you give a small example of your vector and the required result of such a magic function?
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