Hi Adrian, I can not see any reference about scanmeasure and deviation functions in the current spatstat manual: are these included in the newest version of spatstat?
Mathieu 2012/1/9 <adrian.badde...@csiro.au> > > The following message appeared on R-help but this discussion should be > moved to R-sig-geo > > On 07/01/12 02:17, herbert8...@gmx.de wrote: > > > I was searching through the spatstat manual in order to find a function > > to simulate a Poisson pattern only within a fixed radius (circular > moving window) > > around individual points. If points are distributed heterogeneously > over a > > large area this may help to only assess deviation from CSR within the > window > > and thus does not require additional information on a covariate. > > I could not find such a function in spatstat. Can please anyone help? > > What do you want to happen if two of the circles overlap? Should the > density of random points be twice as high? > > If the answer is 'yes' then do the following (where X is your original > point pattern of centres, and 'r' is the radius of the circles, and > 'lambda' is the intensity of random points per unit area in each circle) > > V <- scanmeasure(X, r) > V <- eval.im(lambda * V) > Y <- rpoispp(V) > > If the answer is 'no' then do > W <- dilation(X, r) > Y <- rpoispp(lambda, win=W) > > Adrian Baddeley > > _______________________________________________ > R-sig-Geo mailing list > r-sig-...@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
