[R] two ggplot and colour=x question

[Rainer M Krug]

Hi

I am using ggplot with the aesthetic=list(..., colour=x, ...)

ggplot()
ggline()

I have four different values in x ("ren", "cyn", "mixed", "bare") and I 
have two questions

1) I would like to assign specific colours to the values, i.e. green, 
red, blue and brown. How can I do this? I did not understand 
map_colour_brewer.

2) I don't want the legend top be plot. How can I disable the legend to 
be plotted?

Thanks

Rainer

-- 
Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
Biology (UCT)

Department of Conservation Ecology and Entomology
University of Stellenbosch
Matieland 7602
South Africa

Tel:		+27 - (0)72 808 2975 (w)
Fax:		+27 - (0)86 516 2782
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email:	RKrug at sun.ac.za
       	Rainer at krugs.de