How to calculate the number of data points within a circular boundary?

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Atiqah Zakirah
Atiqah Zakirah 2017-5-12
回答： KSSV 2017-5-12
I need to calculate the number of points within a circle of radius 10 km. The data would be the latitude and longitude coordinates of my location point. And after doing so, how do I store the new data in a matrix? I have no idea how to approach this so any help would be deeply appreciated. Thanks!

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KSSV
KSSV 2017-5-12
Read about knnsearch. With this given a point and a set of points, you can pick the points hwich are lying at a certain distance.

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