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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