Re: [R] Quadrat counting with spatstat

2012-05-31 Thread Petr Savicky
On Thu, May 31, 2012 at 08:23:02AM -0700, AMFTom wrote: > I have photographs of plots that look like so: > > http://r.789695.n4.nabble.com/file/n4631960/Untitled.jpg > > I need to divide it up so each circle has an equal area surrounding it. So > into 20 equal segments, each of which contains a

Re: [R] Quadrat counting with spatstat

2012-05-31 Thread Oliver Ruebenacker
Hello, There is more than one way to do it. I would divide space according to weighted distance. Specify a distance function. Euclidian distance will give you boundaries that consist of ellipse segments. Manhattan distance will give you straight lines which may be preferable. Assign t

Re: [R] Quadrat counting with spatstat

2012-05-31 Thread Clint Bowman
1. Erect a solid, impremeable wall around the perimeter. 2. Put a very flexible, membrane around each circle. 3. Add a drop of low viscosity, low surface tension liquid to each circle. 4. At some point, all circles will have expanded to completely fill the space. 5. The membranes will

Re: [R] Quadrat counting with spatstat

2012-05-31 Thread David Winsemius
On May 31, 2012, at 2:26 PM, R. Michael Weylandt wrote: On Thu, May 31, 2012 at 11:23 AM, AMFTom wrote: I have photographs of plots that look like so: http://r.789695.n4.nabble.com/file/n4631960/Untitled.jpg I need to divide it up so each circle has an equal area surrounding it. So into

Re: [R] Quadrat counting with spatstat

2012-05-31 Thread R. Michael Weylandt
On Thu, May 31, 2012 at 11:23 AM, AMFTom wrote: > I have photographs of plots that look like so: > > http://r.789695.n4.nabble.com/file/n4631960/Untitled.jpg > > I need to divide it up so each circle has an equal area surrounding it. So > into 20 equal segments, each of which contains a circle. Qu

[R] Quadrat counting with spatstat

2012-05-31 Thread AMFTom
I have photographs of plots that look like so: http://r.789695.n4.nabble.com/file/n4631960/Untitled.jpg I need to divide it up so each circle has an equal area surrounding it. So into 20 equal segments, each of which contains a circle. Quadratcount is not sufficient because if I divide it up int