Dear R-ers:
I'm using Thomas Lumley's "survey" package.
I'd like to compute survey ratio estimates (numerator=~utd , denominator=~one)
for each of serval domains using by=~factor(domain).
I can't quite work out the syntax for the call to the "svyby" function. I try:
svyby( numerator=~ utd, denominator=~one , by=~ factor(domain) , design=nis ,
svyratio )
and I get an error that says that "domain" is not found. (nis is the design
object)
Can someone steer me into the correct syntax?
Thanks,
Phil Smith
CDC
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