[R] Piecharts in a graph

[Uwe Ligges]

M. Shiham Adam wrote:

> Dear R-Community.
> 
> I am trying show pie charts on a graph. To be precise, I have series of
> catch calues by species by geographic (5 deg by 5 deg) regions. I want
> to draw circles (actually pie charts showing the proportion of the catch
> in each area) so that I have a graph of catch by species by geographic
> area!
> 
> I know there is the <  symbols(dat$lon,dat$lat,circles = dat$sp1,
> add=TRUE) > but I need pie charts instead of the simple circle!
> 
> Here is some data

Examples can be found, e.g., in

@Article{Rnews:Murrell:2003,
   author       = {Paul Murrell},
   title	       = {Integrating grid Graphics Output with Base Graphics
                   Output },
   journal      = {R News},
   year	       = 2003,
   volume       = 3,
   number       = 2,
   pages	       = {7--12},
   month	       = {October},
   url	       = {http://CRAN.R-project.org/doc/Rnews/}
}

and Paul's talk at the useR! (Slides available at 
http://www.ci.tuwien.ac.at/Conferences/useR-2004/Keynotes/Murrell.pdf).

Uwe Ligges




> 
>>dat
> 
>     lon lat sp1 sp2 sp3
> 1  20  50   2   6  10
> 2  20  55 370  20  23
> 3  20  60 380  40  23
> 4  20  65  60 100  87
> 5  25  50   0   0  98
>  
> Any help would be much appreciated
> 
> Shiham Adam
> 
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