How to select the area between two lines? ggplot

Question

I have a data frame containing a variable, and this is conf. interval

time x x.upper x.lower 1 1.00 0.91 1.11 2 1.03 0.92 1.13 3 1.03 0.95 1.17 2 1.06 0.90 1.13 

I ggplot it:

 library(ggplot2) ggplot(data = df,aes(time,x))+ geom_line(aes(y = x.upper), colour = 'red') + geom_line(aes(y = x.lower), colour = 'blue')+ geom_line() 

I want to highlight the area between the red and blue lines, similar to the geom_smooth() function. How can i do this?

Answer 1

A geom_ribbon is exactly what you need

 ggplot(data = df,aes(time,x))+ geom_ribbon(aes(x=time, ymax=x.upper, ymin=x.lower), fill="pink", alpha=.5) + geom_line(aes(y = x.upper), colour = 'red') + geom_line(aes(y = x.lower), colour = 'blue')+ geom_line()