select_SSU {R2BEAT}

Select sample of secondary stage units (SSU)

Description

Select sample of secondary stage units (SSU) from the population frame on the basis of the SSU allocated to each selected PSU

Usage

     select_SSU(df,PSU_code,SSU_code,PSU_sampled)

Arguments

df

Dataframe containing sampling units (SSUs)

PSU_code

Identifier of each PSU in dataframe containing sampling units

SSU_code

Identifier of each SSU in dataframe containing sampling units

PSU_sampled

Dataframe containing selected PSUs

Value

A dataframe containing the units selected in the sample

Author(s)

Giulio Barcaroli

Examples

## Not run: 
library(readr)
pop <- read_rds("https://github.com/barcaroli/R2BEAT_workflows/blob/master/pop.RDS?raw=true")
library(R2BEAT)
cv <- as.data.frame(list(DOM=c("DOM1","DOM2"),
                         CV1=c(0.02,0.03),
                         CV2=c(0.03,0.06),
                         CV3=c(0.03,0.06),
                         CV4=c(0.05,0.08)))
cv
samp_frame <- pop
samp_frame$one <- 1
id_PSU <- "municipality"  
id_SSU <- "id_ind"        
strata_var <- "stratum"   
target_vars <- c("income_hh","active","inactive","unemployed")   
deff_var <- "stratum"     
domain_var <- "region"  
delta =  1       # households = survey units
minimum <- 50    # minimum number of SSUs to be interviewed in each selected PSU
deff_sugg <- 1.5 # suggestion for the deff value

inp <- prepareInputToAllocation1(samp_frame,
                                  id_PSU,
                                  id_SSU,
                                  strata_var,
                                  target_vars,
                                  deff_var,
                                  domain_var,
                                  minimum,
                                  delta,
                                  deff_sugg)
inp$desfile$MINIMUM <- 50
alloc <- beat.2st(stratif = inp$strata, 
                   errors = cv, 
                   des_file = inp$des_file, 
                   psu_file = inp$psu_file, 
                   rho = inp$rho, 
                   deft_start = NULL,
                   effst = inp$effst, 
                   minPSUstrat = 2,
                   minnumstrat = 50
)
sample_1st <- select_PSU(alloc, type="ALLOC", pps=TRUE, plot=TRUE)
samp <- select_SSU(df=pop,
                   PSU_code="municipality",
                   SSU_code="id_ind",
                   PSU_sampled=sample_1st$sample_PSU)

## End(Not run)