R Under development (unstable) (2024-03-19 r86153 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_no_strat <- data.frame(x = 1:10, id = 1:10, fpc = 10, probs = 1)
> 
> design_no_strat <- svydesign(id = ~id, 
+                              probs = ~probs, 
+                              data = data_no_strat, 
+                              fpc = ~fpc)
> 
> quantiles <- c(0.01, 0.05, 0.1, 0.15, seq(21, 81, 10)*0.01, 0.85, 0.9, 0.95, 0.99)
> 
> res <- svyquantile(~x, design_no_strat, quantiles, ci = TRUE,
+             interval.type = "mean", qrule = "hf1")
> 
> stopifnot(all(diff(res$x[,"quantile"])>=0))
> 
> 
> 
> proc.time()
   user  system elapsed 
   1.54    0.21    1.73