| xy2ID | R Documentation | 
xy (X,Y) into Index in coords
xy2IDConvert the xy (X,Y) into Index in coords
xy2ID
xy2ID(xy, coord)
xy | 
 coordinate (x,y), subset of   | 
coord | 
 coordinate set  | 
Index in coodinate set
coord = matrix(rnorm(10), 5,2)
xy = coord[c(5,1,3),]
xy2ID(xy, coord)
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