[R] Weighted SD

David Winsemius dwinsemius at comcast.net
Mon Feb 1 18:52:54 CET 2010

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.

> Best regards,
> A.A.Morkovin

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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