continuous value supplied to discrete scale

Question

I am new to ggplot2. In fact, I only discovered it last week and I haven\'t quite figured out yet how to use aesthetics and scales etc. There is probably a very easy solutio

Answer 1

Vc should be a factor if you want two values in the legend. You were getting that error because you were trying to scale Vc as discrete (breaks = c(30, 40)) when it was of type integer

ggplot(dadosc, aes(x=Lu, y=Fres, colour=factor(Vc))) +
   ...