Perform a random toroidal shift on a point data set
rtor.shift(pts,rect)A point data set like pts, but after application of a random toroidal
shift along the x and y axes.
The point data set to shift
A rectangle defining the region for the toroidal map. If not given,
the bounding box of pts is used.
The planar region defined by rect
is assumed connected at its top and bottom edges, and at its left and
right sides. A random shift is applied to the
points and the resulting set of points returned.
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: https://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.
Shift