R help - May 2007 - sd with n not n-1

need a version of sd [or var] to return population standard deviation
(using n rather than n-1 denominator) that will operate on a dataframe
containing missings, i.e. unequal n's.  any ideas?  thx, ted.

----------------------------------------
Ted (Edwin) Blew
tblew@ets.org



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need a version of sd [or var] to return population standard deviation
(using n rather than n-1 denominator) that will operate on a dataframe
containing missings, i.e. unequal n's. any ideas? thx, ted.
----------------------------------------
Ted (Edwin) Blew
tblew at ets.org 

--------------------------------------------------
This e-mail and any files transmitted with it may contain privileged or
confidential information.
It is solely for use by the individual for whom it is intended, even if
addressed incorrectly.
If you received this e-mail in error, please notify the sender; do not disclose,
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Thank you for your compliance.