ggplot2 - ribbon
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