R help - Nov 2010 - calculate variance with trimm mean

Dear All
    I have problem about calculte variance use R.
    I use trimm mean by mean(x, trim=.05) and I want to calculate variance
with trimm=.05.
    How I can do this.
Many Thanks.
Jumlong

-- 
Jumlong Vongprasert Assist, Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000

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On Nov 12, 2010, at 1:07 AM, Jumlong Vongprasert wrote:
> Dear All
>    I have problem about calculte variance use R.
>    I use trimm mean by mean(x, trim=.05) and I want to calculate  
> variance
> with trimm=.05.
>    How I can do this.
methods(mean)

Why not take the code for mean.default and substitute var  
for .Internal( mean(x)) ?
> Many Thanks.
> Jumlong
>
> -- 
> Jumlong Vongprasert Assist, Prof.
> Institute of Research and Development
> Ubon Ratchathani Rajabhat University
-- 

David Winsemius, MD
West Hartford, CT