R: Nearest neighbours for two point patterns

n2dist {splancs} | R Documentation

## Nearest neighbours for two point patterns

### Description

Calculate nearest neighbours for two point patterns

### Usage

    n2dist(pts1,pts2)

### Arguments

`pts1,pts2` | Point data sets

### Value

Returns a list with components `$dists` and `$neighs`. `$dists[i]` is the distance of the nearest neighbour of point `pts2[i,]` in `pts1` and `$neighs[i]` is the index in `pts1` of the point nearest to `pts2[i,]`. Documentation and example by Alun Pope, 2007-08-23.

### References

Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern analysis code in S-Plus. Computers and Geosciences, 19, 627-655; the original sources can be accessed at: http://www.maths.lancs.ac.uk/~rowlings/Splancs/. See also Bivand, R. and Gebhardt, A. 2000 Implementing functions for spatial statistical analysis using the R language. Journal of Geographical Systems, 2, 307-317.

### See Also

`nndistF`, `Fhat`, `Ghat`, `Fzero`

### Examples

    (test1 <- matrix(c(151.1791, -33.86056, 151.1599, -33.88729, 151.1528,
    -33.90685, 151.1811, -33.85937),nrow=4,byrow=TRUE))
    (test2 <- as.points(151.15, -33.9))
    n2dist(test1,test2)
    n2dist(test2,test1)

[Package splancs version 2.01-40 Index]