sampling (version 0.1)

UPsystematic: Systematic sampling

Description

Use systematic method to select a sample of units (unequal probabilities, without replacement, fixed sample size).

Usage

UPsystematic(pik)

Arguments

pik

vector of prescribed inclusion probabilities.

Details

Return a vector (0 and 1) of size N, where N is the population size.

References

Madow, W.G. (1949), On the theory of systematic sampling, II, Annals of Mathematical Statistics, 20, 333-354.

See Also

inclusionprobabilities,UPrandomsystematic

Examples

############
## Example 1
############
#define the prescribed inclusion probabilities
pik=c(0.2,0.7,0.8,0.5,0.4,0.4)
#select a sample
UPsystematic(pik)
############
## Example 2
############
data(belgianmunicipalities)
Tot=belgianmunicipalities$Tot04
name=belgianmunicipalities$Commune
pik=inclusionprobabilities(Tot,200)
#select a sample
s=UPsystematic(pik)  
as.vector(name[s==1])