how to know which row is read in knn

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Nana Fernandes 2017-4-22

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评论： Nana Fernandes 2017-4-23

i have a code which runs knn and compares two excel sheets and give me the value whether its a fault or not. i want to know which row of my excel sheet is helping it determine whether its a fault or not a fault

Thanks in advance

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Answer 1

Image Analyst 2017-4-22

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https://ww2.mathworks.cn/matlabcentral/answers/336641-how-to-know-which-row-is-read-in-knn#answer_264026

kNearestNeighbor.m

It depends on which rows are the reference and which are the unknown data to be classified. The row being used to determine the class of some test/unknown points is the reference data. The knnsearch() function looks at the k nearest neighbors of your test point and gets the distances to them. You can consider the test point as belonging to the class that has the most points next to your test point. I illustrate that in my attached demo.