Not really sure I understand your constraints, but perhaps RSiteSearch("convex hull ")
might help? --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity. On August 15, 2014 7:51:37 AM PDT, Bob O'Hara <rni....@gmail.com> wrote: >I've been struggling for half a day on what should be a simple >problem... > >I have a data frame of lat/long coordinates that describe a region, and >I >want to draw a polygon around them so I can use that as a boundary (to >be >thrown at INLA, but those details aren't important). The coordinates >are >almost on a regular grid: there is some variation in latitude (because >we're on a globe). > >If the coordinates were on a regular grid, I could use as.owin() to >create >a mask, and go on from there (I have code that will work). But >as.owin() >doesn't like unevenly spaced points. > >Can anyone suggest a way to sort this out? Preferable without having to >mess around transforming the coordinates. > >Bob ______________________________________________ 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.