[R] Question about ggplot2 and stat_smooth

[Thomas.Adams at noaa.gov]

Hadley,

Thanks for responding. No, not smoothed quantile regression. If you go here: http://www.erh.noaa.gov/mmefs/index.php and click on one of the colored squares, you can see we have 'boxplots'. What I want to express is the uncertainty as depicted in the example from my previous email where I can specify the limits calculated for the 'boxplots' using  5%, 25%,75%, 95% limits as we have with the 'boxplots'.

Tom

----- Original Message -----
From: Hadley Wickham <hadley at rice.edu>
Date: Tuesday, October 4, 2011 10:23 am
Subject: Re: [R] Question about ggplot2 and stat_smooth
To: Thomas Adams <Thomas.Adams at noaa.gov>
Cc: R-help forum <r-help at r-project.org>


> On Mon, Oct 3, 2011 at 12:24 PM, Thomas Adams <Thomas.Adams at noaa.gov> 
> wrote:
> >  I'm interested in creating a graphic -like- this:
> >
> > c <- ggplot(mtcars, aes(qsec, wt))
> > c + geom_point() + stat_smooth(fill="blue", colour="darkblue", 
> size=2, alpha
> > = 0.2)
> >
> > but I need to show 2 sets of bands (with different shading) using 
> 5%, 25%,
> > 75%, 95% limits that I specify and where the heavy blue line is the 
> median.
> > I don't understand how to do this with ggplot2.
> 
> Exactly what sort of limits do you want?  It sounds like maybe you are
> looking for smoothed quantile regression.
> 
> Hadley
> 
> -- 
> Assistant Professor / Dobelman Family Junior Chair
> Department of Statistics / Rice University
>