Legend with geom_line and geom_ribbon

Question

I am creating a figure where I have a line and confidence bands around it. To do this, I am using both geom_line and geom_ribbon in ggplot2

Answer 1

You can make to separate legends - one for the color of line and one for the fill of the ribbon. Then with scale_... set the names for the legend to blank. Only problem is that legend keys will be separated.

ggplot(plotdata) + geom_line(aes(y=y, x=x, colour = "sin"))+
      geom_ribbon(aes(ymin=lower, ymax=upper, x=x, fill = "band"), alpha = 0.3)+
      scale_colour_manual("",values="blue")+
      scale_fill_manual("",values="grey12")