Generating a polygon around points
Not really sure I understand your constraints, but perhaps
RSiteSearch("convex hull ")
might help?
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnewmil at 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.boh at 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