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 simply.
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?
-tomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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