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 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?
... or, for completeness, replication weights, which can be handled by
explicit case replication, but not using the weights= argument.
--
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c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
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~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907
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