how to create a quantile variable using the function svryr::survey_quantile()

[Rony]

Hi there,

I'd like to know how could I create a variable with the values of the quantiles using the svryr::survey_quantile() function.
Here is an example:

library(survey)
library(dplyr)
library(srvyr)

data(api)
dstrata <- apistrat %>%
  as_survey_design(strata = stype, weights = pw)

dstrata %>%
  select(1:2, api99) %>% 
  mutate(quintil = survey_quantile(api99, c(0.2, 0.4, 0.6, 0.8), vartype = NULL))

I was tryng to use the pivot_longer after the mutate to solve this, but, I can't select the coluns created by this function. I don't know why.

I'd like something like this:

dstrata %>%
  select(1:2, api99) %>% 
  mutate(quintil = ntile(api99, 5)) %>% 
  as_tibble()

But, with the survey_quantile function to make sure I'm working rigth with survey.

If is possible, I also would like to have the values not just the number indicating the quantile.

Someone to help?