Hello fellow R's,
I´ve been learning to use the ggplot2 library, and after a full day of
work I still have a couple of basic questions.
Here is an example:
mydata=data.frame(x=runif(20),y=runif(20),n=runif(20))
mydata2=data.frame(x=c(0.4,0.6,0.5),y=c(0.4,0.4,0.6))
ggplot(mydata, aes(x, y)) + geom_point(aes(size = n)) +
geom_polygon(data=mydata2,aes(x,y,alpha=0.5))
In this plot, the points are labeled as "n" (the name of the variable)
and the polygon is labeled as "0.5" (the alpha value used). My
questions are:
a) How to change the text in the legend (for example, "number" instead
of "n").
b) How to avoid having a legend for the polygon?
Many thanks,
Julian
--
Julian Mariano Burgos
Hafrannsóknastofnunin/Marine Research Institute
Skúlagata 4, 121 Reykjavík, Iceland
Sími/Telephone : +354-5752037
Bréfsími/Telefax: +354-5752001
Netfang/Email: jul...@hafro.is, jmbur...@u.washington.edu
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