as.points.RdCreates data in spatial point format.
as.points(...)any object(s), such as x and y vectors of the same length, or a list or data
frame containing x and y vectors. Valid options for ... are:
a points object ; returns it unaltered;
a list with x and y elements of the same length --- returns a
points object with the x and y elements as the coordinates of the points;
two vectors of equal length ; returns a points object with the
first vector as the x coordinates, the second vector as the y-coordinates.
as.points tries to return the argument(s) as a points object.
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.