R help - Apr 2013 - Batch open netcdf files and get variables

Hi, I'm new to R. I have some daily soil moisture data for the year 1979 in
netcdf format such as these
sm19790101.1.nc
sm19790102.1.nc
.
.
.
sm19791231.1.nc

I need to average a variable called "sm" to monthly resolution.
I've done these

days = formatC(1:31, width=2, flag="0")
ncfiles = lapply(days, function(d){
    filename = paste("sm197901", d, ".1.nc",
sep="")
    #print(filename)
    open.nc(filename)
})

to open the files in January. Questions is: how may I get the variable from each
opened file. Rnetcdf package has the var.get.nc() that only read object of class
"Netcdf" returned from open.nc(). Any help would be appreciated.

Enhao
	[[alternative HTML version deleted]]

I make an example for the use of this package here:
http://max2.ese.u-psud.fr/epc/conservation/Girondot/Publications/Blog_r/Entrees/2013/2/26_Using_package_RNetCDF_with_SST.html

Sincerely
Marc Girondot

Le 12/04/13 17:39, Enhao Du a ?crit :
> Hi, I'm new to R. I have some daily soil moisture data for the year
1979 in netcdf format such as these
> sm19790101.1.nc
> sm19790102.1.nc
> .
> .
> .
> sm19791231.1.nc
>
> I need to average a variable called "sm" to monthly resolution.
I've done these
>
> days = formatC(1:31, width=2, flag="0")
> ncfiles = lapply(days, function(d){
>      filename = paste("sm197901", d, ".1.nc",
sep="")
>      #print(filename)
>      open.nc(filename)
> })
>
> to open the files in January. Questions is: how may I get the variable from
each opened file. Rnetcdf package has the var.get.nc() that only read object of
class "Netcdf" returned from open.nc(). Any help would be appreciated.
>
> Enhao
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
__________________________________________________________
Marc Girondot, Pr

Laboratoire Ecologie, Syst?matique et Evolution
Equipe de Conservation des Populations et des Communaut?s
CNRS, AgroParisTech et Universit? Paris-Sud 11 , UMR 8079
B?timent 362
91405 Orsay Cedex, France

Tel:  33 1 (0)1.69.15.72.30   Fax: 33 1 (0)1.69.15.73.53
e-mail: marc.girondot at u-psud.fr
Web: http://www.ese.u-psud.fr/epc/conservation/Marc.html
Skype: girondot