| pip {splancs} | R Documentation |
Return points inside or outside a polygon.
pip(pts,poly,out=FALSE,bound=NULL,quiet=TRUE)
pts |
A points data set |
poly |
A polygon data set |
out |
If out=TRUE, return the points outside the polygon, else the points inside.
|
bound |
If points fall exactly on polygon boundaries, the default NULL gives arbitrary assignments. If TRUE, then all points "on" boundaries are set as within the polygon, if FALSE, outside. |
quiet |
Do not report which points are on boundary for non-NULL bound |
pip calls inout, then selects the appropriate sub-set of points.
pip returns the points of pts that lie inside (or outside with
out=TRUE)
the polygon poly. Compare this with inpip, which returns
the indices of
the points in the polygon, and inout which returns a logical vector
indicating whether points are inside or outside.
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.