HI,

 

I am working on a data set with multiple collections of mosquitoes at
sampling sites. Each row represents a collection of individual samples
with coordinates for each collection. 

... X,  Y,...

1  36.435 30.118

2  36.435 30.118

3  36.435 30.118

4  35.329 29.657

5  35.329 29.657

6  36.431 30.111

7  36.431 30.111

8  35.421 29.797

9  35.421 29.797

10 35.421 29.797

 

Unfortunately, there is no 'site' entry. I would like to add a column of
'site' based on the coordinates of samples so that samples from the same
sites have the same site ID like S1, S2,.... 

 

How to do this in R way? Thanks.

 

 

Weidong Gu, 

Department of Medicine
University of Alabama, Birmingham
1900 University Blvd., Birmingham, Alabama 35294
Email: wgu@uab.edu
PH: (205)-975-9053

 


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