[R] Weighted SD
dwinsemius at comcast.net
Mon Feb 1 21:54:45 CET 2010
On Feb 1, 2010, at 3:32 PM, Thomas Lumley wrote:
> On Mon, 1 Feb 2010, David Winsemius wrote:
>> On Feb 1, 2010, at 12:37 PM, Антон Морковин wrote:
>>> Dear all,
>>> what function can be used to calculate weighted SD or/and SE¿
>>> There's no such stuff in 'base' package.
>> Seems as though lm with a weights argument could be used fairly
> As I have pointed out from time to time, it depends on what the
> weights are for -- are they precision weights, which lm() can
> handle, or sampling weights, which it can't?
I'm looking forward to your book being released.
> Thomas Lumley Assoc. Professor, Biostatistics
> tlumley at u.washington.edu University of Washington, Seattle
David Winsemius, MD
West Hartford, CT
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