R version 3.1.0 (2014-04-10) -- "Spring Dance"
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> library(survey)
Attaching package: 'survey'
The following object is masked from 'package:graphics':
dotchart
> ## check many permutations of fpc specification
> example(fpc)
fpc> data(fpc)
fpc> fpc
stratid psuid weight nh Nh x
1 1 1 3 5 15 2.8
2 1 2 3 5 15 4.1
3 1 3 3 5 15 6.8
4 1 4 3 5 15 6.8
5 1 5 3 5 15 9.2
6 2 1 4 3 12 3.7
7 2 2 4 3 12 6.6
8 2 3 4 3 12 4.2
fpc> withoutfpc<-svydesign(weights=~weight, ids=~psuid, strata=~stratid, variables=~x,
fpc+ data=fpc, nest=TRUE)
fpc> withoutfpc
Stratified Independent Sampling design (with replacement)
svydesign(weights = ~weight, ids = ~psuid, strata = ~stratid,
variables = ~x, data = fpc, nest = TRUE)
fpc> svymean(~x, withoutfpc)
mean SE
x 5.4481 0.7413
fpc> withfpc<-svydesign(weights=~weight, ids=~psuid, strata=~stratid,
fpc+ fpc=~Nh, variables=~x, data=fpc, nest=TRUE)
fpc> withfpc
Stratified Independent Sampling design
svydesign(weights = ~weight, ids = ~psuid, strata = ~stratid,
fpc = ~Nh, variables = ~x, data = fpc, nest = TRUE)
fpc> svymean(~x, withfpc)
mean SE
x 5.4481 0.616
fpc> ## Other equivalent forms
fpc> withfpc<-svydesign(prob=~I(1/weight), ids=~psuid, strata=~stratid,
fpc+ fpc=~Nh, variables=~x, data=fpc, nest=TRUE)
fpc> svymean(~x, withfpc)
mean SE
x 5.4481 0.616
fpc> withfpc<-svydesign(weights=~weight, ids=~psuid, strata=~stratid,
fpc+ fpc=~I(nh/Nh), variables=~x, data=fpc, nest=TRUE)
fpc> svymean(~x, withfpc)
mean SE
x 5.4481 0.616
fpc> withfpc<-svydesign(weights=~weight, ids=~interaction(stratid,psuid),
fpc+ strata=~stratid, fpc=~I(nh/Nh), variables=~x, data=fpc)
fpc> svymean(~x, withfpc)
mean SE
x 5.4481 0.616
fpc> withfpc<-svydesign(ids=~psuid, strata=~stratid, fpc=~Nh,
fpc+ variables=~x,data=fpc,nest=TRUE)
fpc> svymean(~x, withfpc)
mean SE
x 5.4481 0.616
fpc> withfpc<-svydesign(ids=~psuid, strata=~stratid,
fpc+ fpc=~I(nh/Nh), variables=~x, data=fpc, nest=TRUE)
fpc> svymean(~x, withfpc)
mean SE
x 5.4481 0.616
>
>
> proc.time()
user system elapsed
0.194 0.025 0.229
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