> p<-ggplot(reading.melt,aes(x=Date,y=value))
> p+geom_path(aes(colour=Type),size=2)+facet_grid(variable~.)
>
> but can't figure out
> (1) How to add a transparent shade between the Paid & Total lines. I've
> tried the ribbon function, but cant seem to get it to shade between the
> lines
To do this you'll need the data in a different format
df <- cast(reading.melt, ... ~ Type)
Then add on a ribbon as follows
p <- ggplot(reading.melt,aes(x=Date)) +
facet_grid(variable ~ .) +
geom_ribbon(aes(min = Paid, max=Total), data=df, fill=alpha("black",
0.1), colour=NA) +
geom_path(aes(colour=Type ,y=value))
> (2) Add a left justified title to the chart
p + opts(title = "My title")
adds a title, and to left justify it, you need to use grid to modify it:
grid.edit("title", x=unit(0, "npc"), hjust=0)
Hadley
--
http://had.co.nz/
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