Add points interactively to a point data set.
addpoints(pts,plot=FALSE,quiet=FALSE)
A points data set consisting of pts
and the points entered on the current
graphics device.
A points data set.
if true, plot the pts
data, using pointmap
. If false,
or if pts
is missing,
don't plot the data.
if true, don't print a prompt to enter points.
The points entered are displayed on the current graphics device.
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.
delpoints