ggplot: remove lines at ribbon edges

Question

I am using ggplot to plot time course data (fixation proportions over time to different objects on the screen) and want to use a ribbon to show the SE, but the ribb

Answer 1

Here you go

ggplot(d, aes(Time, y,  fill=Object)) + 
  geom_line(size=2, aes(colour = Object)) + 
  geom_ribbon(aes(ymin=lower, ymax=upper), alpha=.3)