shading between two lines

[Michael Cawthon]

Given a data frame:

data <- data.frame(year = 2001:2010, y1 = 1:10, y2 = seq(10,13,1/3))

We plot the two lines over time:

ggplot(data, aes(x = year)) + geom_line(aes(y=y1), color = 'red') + geom_line(aes(y = y2), color = 'blue')

Suppose we want to shade a region in between the two lines; how can this be accomplished?

I've attempted using both geom_area() and geom_polygon(), but I am struggling with the appropriate mapping.

Thank you for your help.

[Ista Zahn]

I think you want geom_ribbon:

ggplot(data, aes(x = year)) +

geom_ribbon(aes(ymin = y1, ymax = y2), fill = "green") +

geom_line(aes(y=y1), color = 'red') +
geom_line(aes(y = y2), color = 'blue')

Best,
Ista

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