How to highlight area between two lines? ggplot

Question

I have data frame containing variable and it's 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 area between red and blue lines, smth similar to geom_smooth() function. How can I do it?

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()