[R-sig-eco] polar plot mappng

[Nicholas Lewin-Koh]

Hi Fraser,
I believe the package plotrix has a polar plot
function. For circular statistics there are the packages CircStats, and
circular
on CRAN. Those should have what you need.

Nicholas
> ------------------------------
> 
> Message: 3
> Date: Tue, 8 Jul 2008 14:35:16 -0400
> From: Fraser Smith <f.smith at utoronto.ca>
> Subject: [R-sig-eco] polar plot mappng
> To: r-sig-ecology at r-project.org
> Message-ID: <1E021577-479A-43F4-8095-4B9BB5D2B8D6 at utoronto.ca>
> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> 
> Dear list members,
> I am very new to R, so apologies for the broad nature of these  
> questions.
> 
> I am currently attempting to run through some of my data from the  
> Yukon Territory analyzing spatial layout of live/dead trees and stumps  
> following partial stand harvesting.
> The surveying of these trees involved circular plots with a 20m fixed- 
> radius. Recordings for location involved a laser range-finder and  
> electronic compass, and therefore all records have distance- (0-20  
> from centre) and bearing- values (0-360 degrees) to pinpoint location.  
> In order to plot and analyze this data, I wish to use the distance and  
> bearing values as they are for a measurement from a center point,  
> instead of converting to an x-y coordinate system or transforming the  
> data into radians etc.
> I am wondering if anyone could recommend any resources, functions,  
> packages, search terms, etc. for effectively 'mapping' these stems?
> 
> Also, while visualizing this data is a first step, I would like to  
> later incorporate rose diagrams/circular statistics for tree fall  
> direction, prevailing winds, slope, aspect, etc as an overlay or  
> direct comparison to these plot maps. Essentially, I suppose I want to  
> get R to think in polar plot coordinates instead of cartesian  
> coordinates for this data
> Any help with resources on these procedures specifically related to R  
> would be greatly appreciated.
> 
> 
> Fraser Smith
> 
> MScF student
> Faculty of Forestry, University of Toronto
> f.smith at utoronto.ca
> 
>