[BioC] how to add SD onto a plot

[Jianping Jin]

Dear list,

Does any one know how to add SD information of a data set onto a plot which 
displays mean values for each group? I did something like:

> x = c(0,1,2,3)
> y = apply(data,2,mean)
> plot(x,y)

Thanks for you help!

Jianping

##################################
Jianping Jin Ph.D.
Bioinformatics scientist
Center for Bioinformatics
Room 3133 Bioinformatics building
CB# 7104
University of Chapel Hill
Chapel Hill, NC 27599
Phone: (919)843-6105
FAX:   (919)843-3103
E-Mail: jjin at email.unc.edu