R help - Jan 2011 - ggplot2 - ribbon

Dear List,

I am having trouble setting the transparency of a ribbon in ggplot2 and was
wondering if anybody had any suggestions

so far i have a plot exactly as i want it and i want to add a ribbon connecting
the ymax and ymin, whci i do with the following command

m10 + stat_summary(geom="ribbon", fun.ymin="min",
fun.ymax="max")

However the ribbon is a dark grey and i want to make it much lighter or change
the colour. I was wondering if anybody had any ideas?

I have kept the code used so far brief as it is quite long, however i can expand
if required.

Thanks

Sam

On 1/24/2011 7:44 AM, Sam wrote:
>
>
> Dear List,
>
> I am having trouble setting the transparency of a ribbon in ggplot2
> and was wondering if anybody had any suggestions
>
> so far i have a plot exactly as i want it and i want to add a ribbon
> connecting the ymax and ymin, whci i do with the following command
>
> m10 + stat_summary(geom="ribbon", fun.ymin="min",
fun.ymax="max")
>
> However the ribbon is a dark grey and i want to make it much lighter
> or change the colour. I was wondering if anybody had any ideas?
>
> I have kept the code used so far brief as it is quite long, however i
> can expand if required.
To see what is happening, a simple toy example works; the details of 
your specific graph aren't needed.

p <- ggplot(mtcars, aes(x=carb, y=mpg)) + geom_point()

p + stat_summary(geom="ribbon", fun.ymin="min",
fun.ymax="max")

p + stat_summary(geom="ribbon", fun.ymin="min",
fun.ymax="max",
	alpha=0.2, fill="blue")

You can set the transparency (alpha) of the fill and the color of the 
fill (fill) to whatever you want.  You can also set the color of the 
lines around the fill with colour. As fixed (not data determined) 
values, they are not inside an aes call.
> Thanks
>
> Sam
-- 
Brian S. Diggs, PhD
Senior Research Associate, Department of Surgery
Oregon Health & Science University