How to find the nearest neighbors points in this case ?

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Matlab111
Matlab111 2014-12-6
回答： Rohini Sharma 2015-4-30
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
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
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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Image Analyst
Image Analyst 2014-12-7
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.
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Matlab111
Matlab111 2014-12-7
sir what that "%15f %15f" indicates in "fprintf(' Sensor node: %15f %15f', x, y);"

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Rohini Sharma
Rohini Sharma 2015-4-30
Hello Arul and Image Analyst
How to modify the code in order to connect gateway node with only one sensor node? Here gateway node is connection to all sensor node with in its range=10.
Please reply Thanks

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