[R-sig-Geo] help with county map fill type

[David Maxwell (Cefas)]

Michael
adding fill = TRUE  (so that polygon is used) works for me.
David

David Maxwell
Cefas	
Lowestoft Laboratory		
Suffolk				
NR33 OHT			   
UK
 
www.cefas.co.uk


-----Original Message-----
From: r-sig-geo-bounces at stat.math.ethz.ch
[mailto:r-sig-geo-bounces at stat.math.ethz.ch]On Behalf Of Michael Denslow
Sent: 10 November 2008 14:23
To: r-sig-geo at stat.math.ethz.ch
Subject: [R-sig-Geo] help with county map fill type



Dear List,

I am attempting to generate some county level species distribution maps for a publication. The idea is to show three different categories on one map; one for species A, one for species B and one for a county that has both.
Ideally I think some sort of hatching or pattern would be best. I am afraid that my grey scale example will not show up well in print.
In ?map, it says '... Extra arguments passed to polygon or lines'. However if I use the density or angle arguments, it doesn't work.
I am afraid that I am missing something obvious here, please help.

Thanks
Michael

library(maps)
data(stateMapEnv)

map('county', 'north carolina', 
	boundary = TRUE,
	lty = 1)

map('county', region = c('North Carolina,Watauga'), 
	fill = TRUE, col = 'grey80', add = TRUE)

map('county', region = c('North Carolina,Avery'), 
	fill = TRUE, col = 'grey50', add = TRUE)

map('county', region = c('North Carolina,Ashe'), 
	fill = TRUE, col = 'black', add = TRUE)

## try to use density and angle
map('county', region = c('North Carolina,Wilkes'), 
	density = 20,angle = 90, col = 'black', add = TRUE)


Michael Denslow

I.W. Carpenter Jr. Herbarium [BOON]
Appalachian State University
Boone, North Carolina U.S.A.

-- AND --

Communications Manager
Southeastern Regional Network of Expertise and Collections
sernec.org

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