search for: convexhul

Hi, I have a problem while loading the "siar" program in R. When I am loading siar, system does not load convexhull. On the screen I have seen such writings. The following object(s) are masked from ‘package:spatstat’: convexhull How can I load the convexhull, how can I unmask from this package? I will be appreciated if you give advice about this. Best Sukran [[alternative HTML version deleted]]

...s anyone have a suggestion (or better still) code for sampling > from the uniform distribution over the convex hull of a set of > points? This is implemented in library 'spatstat'. If x and y are vectors of coordinates of your initial set of points, library(spatstat) W <- convexhull.xy(x, y) P <- runifpoint(42, W) will compute the convex hull and generate 42 independent uniformly-distributed points in the convex hull. The result can be plotted by plot(P) and the coordinates of the simulated points can be extracted as P$x and P$y. Adrian Baddeley

Dear UseRs, I would like to know which function is the most efficient in finding convex hull of points in 3(or 2)-dimensional case? Functions for finding convex hull is the following: convex.hull (tripack), chull (grDevices), in.chull (sgeostat), convhulln (geometry), convexhull.xy (spatstat), calcConvexHull (PBSmapping). I also would like to know if there is a function that can be used for finding convex hull in multi-dimensional case, that is more than 3- dimension. Thank you in advance.

Dear, I would like to use the siar program, when I lodging package the message appear, so I couldn't use the related calculations. The following object(s) are masked from ‘package:spatstat’:convexhull Could you please write me what shoud I do? Sukran Yalcin Ozdilek [[alternative HTML version deleted]]