R Under development (unstable) (2024-03-08 r86070 ucrt) -- "Unsuffered Consequences"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(survey)
Loading required package: grid
Loading required package: Matrix
Loading required package: survival

Attaching package: 'survey'

The following object is masked from 'package:graphics':

    dotchart

> data(api)
> dstrat<-svydesign(id=~1,strata=~stype, weights=~pw, data=apistrat, fpc=~fpc)
> 
> a<-svyby(~enroll,~stype,design=dstrat,svytotal,vartype=c("ci","se"))
> b<-svyby(~enroll,~stype,design=dstrat,svytotal,vartype=c("se","ci"))
> 
> 
> stopifnot(all.equal(SE(a),SE(b)))
> 
> proc.time()
   user  system elapsed 
   1.50    0.07    1.51