Hello, I'm a beginner in R so this is probably a very basic question hope you could help me.
I would like to make the same plot but instead of using all "specie" levels just with some of them, for example the first four ("En", "FC","NF" and "NL").
Code:
ggplot(data= TF_IGcurve, aes (x=irradiance, y=growth, colour=specie)) +geom_point(size=2,shape=21,fill="black")+geom_line(linetype=1, size=1)+labs(x="Irradiance",y="Growth rate")
Thank you!! 