Create geom_ribbon for min-max range

Question

Given the following data: ``` df<-data.frame( year=(1996:2000), a=c(2,1.5,1.5,2,3), b=c(2,2,2,3,4), c=c(2,3,3,1,1)) ``` with ggplot: ``` ggplot(df,aes(x=year))+ geom_line(aes(y=a))+ geom_line(aes(y=b))+ geom_line(aes(y=c)) ``` looking like this: how. can I create a ribbon that shows always the area between minimum and maximum (think of it like a min-max-range), to get it look like this:

Accepted Answer

What about first computing the mininum and maximum values:

```
df$min <- apply(df[, -1], 1, min)
df$max <- apply(df[, -1], 1, max)
```

And then simply plotting the ribbon:

```
ggplot(df, aes(x = year, ymin = min, ymax = max)) + geom_ribbon()
```

Create geom_ribbon for min-max range

Solution

Problem