dsquare: Distance-squared from a number of points to a number of sources
Description
Computes the distance-squared from a number of points to a number of sources.
Usage
dsquare(pts, srcs, namepref="d")
Arguments
pts
A number of points representing the locations of cases and controls.
srcs
A number of points representing source locations
namepref
A prefix given to the name of the results.
Value
A data frame with the same number of columns as srcs. The column names will
be the value of namepref prefixing the numbers from 1 to the number
of sources.
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.