Dear all,
I got point data of trees. I was wondering if anybody has experience in
searching the neighbors within a specified distance efficiently.
X Y Z
99 34 65
98 35 29
98 34 28
99 33 33
98 32 23
99 33 21
99 33 22
99 32 24
99 30 23
...
What I want to do is : searching for the neighbors with a distance R for each
tree & the neighbor must have a bigger Z.
The data set is huge so the R-codes is working slowly when I search it without
subset it.
Any suggestion would be much appreciated!
Leaf
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