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Belphegor
Belphegor
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I am currently debating with my friend about how KNN handles duplicates. Suppose K = 2, and we have a 1-dimensional set of data points to illustrate my dilemma

I = {1, 2, 2, 2, 2, 2, 6}

Thus is it correct to say that the K=2 nearest neighbours of data point 1 is simply {2, 2}? Also, same reasoning if we did the 2 nearest neighbours of data point 2 it would be {2, 2} as well not including itself?

I am currently debating with my friend about how KNN handles duplicates. Suppose K = 2, and we have a 1-dimensional set of data points to illustrate my dilemma

I = {1, 2, 2, 2, 2, 2}

Thus is it correct to say that the K=2 nearest neighbours of data point 1 is simply {2, 2}? Also, same reasoning if we did the 2 nearest neighbours of data point 2 it would be {2, 2} as well not including itself?

I am currently debating with my friend about how KNN handles duplicates. Suppose K = 2, and we have a 1-dimensional set of data points to illustrate my dilemma

I = {1, 2, 2, 2, 2, 2, 6}

Thus is it correct to say that the K=2 nearest neighbours of data point 1 is simply {2, 2}? Also, same reasoning if we did the 2 nearest neighbours of data point 2 it would be {2, 2} as well not including itself?

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Belphegor
Belphegor
  • 155
  • 1
  • 1
  • 8

How does KNN work if there are duplicates?

I am currently debating with my friend about how KNN handles duplicates. Suppose K = 2, and we have a 1-dimensional set of data points to illustrate my dilemma

I = {1, 2, 2, 2, 2, 2}

Thus is it correct to say that the K=2 nearest neighbours of data point 1 is simply {2, 2}? Also, same reasoning if we did the 2 nearest neighbours of data point 2 it would be {2, 2} as well not including itself?