R Under development (unstable) (2024-03-19 r86153 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)
> dclus2<-svydesign(id=~dnum+snum, weights=~pw, data=apiclus2)
> rclus2<-as.svrepdesign(dclus2)
> model<-svyglm(formula = api00 ~ ell + meals + mobility, design = rclus2)
> svycontrast(model, c(ell=1,meals=0))
         contrast     SE
contrast  -2.0592 1.6177
> a<-svycontrast(model, c(0,1,0,0))
> 
> model2<-svyglm(formula = api00 ~ ell + meals + mobility, design = rclus2,return.replicates=TRUE)
> svycontrast(model2, c(ell=1,meals=0))
         contrast     SE
contrast  -2.0592 1.6177
> a2<-svycontrast(model2, c(0,1,0,0))
> stopifnot(!is.null(a2$replicates))
> 
> proc.time()
   user  system elapsed 
   1.81    0.21    2.01