Generating a polygon around points

Not really sure I understand your constraints, but perhaps

RSiteSearch("convex hull ")

might help?
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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