R Under development (unstable) (2026-02-23 r89457 ucrt) -- "Unsuffered Consequences"
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> 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)
> 
> dsrs <- svydesign(id=~1, weights=~pw, data=apisrs)
> 
> # Add records with 0 weight
> apisrs_0 <- apisrs
> apisrs_0$pw <- NA
> apisrs2 <- rbind(apisrs, apisrs_0)
> dsrs2 <- svydesign(id=~1, weights=~pw, data=apisrs2, na_weight="allow")
> 
> stopifnot(coef(svytotal(~enroll, dsrs))==coef(svytotal(~enroll, dsrs2)))
> stopifnot(SE(svytotal(~enroll, dsrs))==SE(svytotal(~enroll, dsrs2)))
> 
> proc.time()
   user  system elapsed 
   0.95    0.17    1.11