R Package for Climatology particular for netCDF file

Dear Dr. Pierce and R specialists,

I am much appreciated your work on ncdf(ncdf4 and RnetCDF) packages,
however, I am wondering if those package can go further.

Is there a package for calculating climate statistics ,e.g. monthly mean,
seasonal mean, yearly mean,spatial mean( like gridboxmean in CDO), and
climatology for multiyear analysis in R or CRAN ? and Is there a plotting
library for the climate variables particularly for NetCDF.

I found a little trivial when I plan to do statistical based on daily data
for long history (I do it using some tools but not efficient, everytime I
need to generate a file and then use ncdf funcitons to read and then plot.

Thanks,

Ping