Re: [R-sig-Geo] error in trmesh (alphahull package)

2009-04-04 Thread Murray Richardson
Ahhh - so simple, my mistake. Thanks! Murray José Manuel Blanco Moreno wrote: Hello, The problem is that your first three points CANNOT be collinear. This is a feature of trmesh in tripack. So: either you "unsort" your data (keeping the indices you can sort them again) or alter (e.g. jitter)

Re: [R-sig-Geo] error in trmesh (alphahull package)

2009-04-04 Thread José Manuel Blanco Moreno
Hello, The problem is that your first three points CANNOT be collinear. This is a feature of trmesh in tripack. So: either you "unsort" your data (keeping the indices you can sort them again) or alter (e.g. jitter) the coordinates very slightly. Either solution will do the work. Cheers, José M

[R-sig-Geo] error in trmesh (alphahull package)

2009-04-03 Thread Murray Richardson
Hello R community, I have cross-posted with r-sig-geo as this issue could fall under either interest group I believe. I just came accross the alphahull package and am very pleased I may not need to use CGAL anymore for this purpose. However, I am having a problem computing alpha shapes wit