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