> a) How to change the text in the legend (for example, "number" instead of
> "n").
Use: scale_size("number")
> b) How to avoid having a legend for the polygon?
Don't include the value for alpha inside aes (you want to set it as
opposed to mapping it).
So,
ggplot(mydata, aes(x, y)) + geom_point(aes(size = n)) +
geom_polygon(data=mydata2,aes(x,y),alpha = 0.5) + scale_size("number")
should be what you want.
Charlotte
> 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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