How to find the nearest neighbors points in this case ?

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Matlab111 2014-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/165673-how-to-find-the-nearest-neighbors-points-in-this-case

回答： Rohini Sharma 2015-4-30

mathwork_1.txt

just see this image 1 in this they where creating wsn(wireless sensor network). This i have done in matlab you can see my coding also i attached below.

Image-1

Image-2

in this image they are finding nearest sensor node gateway's, so now i want to find the sensor node nearest sensor node gateway's please help me..

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Image Analyst 2014-12-7

I just blindly ran the code and it made this:

It doesn't look anything like your gateway and sensor node image with the blue and green spots above. Can you explain this plot? It's not explained in the code - the comments are very very minimal. And I don't see any image, just a plot or scatterplot.

Matlab111 2014-12-7

sir, in this figure 'X' is denoted as gateway node and 'o' this denoted as normal sensor node's.

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采纳的回答

Image Analyst 2014-12-7

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/165673-how-to-find-the-nearest-neighbors-points-in-this-case#answer_161576

So you don't have to start with an image. You have a list of (x,y) coordinates for gateways and sensors. So why can't you just run through the list with a for loop calculating the distance of each gateway to all the sensors, and select sensors that are closer than some specified distance? Just use the Pythagorean theorem and a double for loop. Draw lines to "close" pairs. Seems pretty easy.