UPrandomsystematic {sampling}R Documentation

Random systematic sampling

Description

Select a sample using the systematic method, when the order of units in population is random (unequal probabilities, without replacement, fixed sample size).

Usage

UPrandomsystematic(pik)

Arguments

pik vector of prescribed inclusion probabilities.

Details

Return a vector (with elements 0 and 1) of size N, where N is the population size. Each element k of this vector indicates the status of the unit k (1, the unit k is selected in the sample; 0, otherwise).

References

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

See Also

UPsystematic

Examples

#define the prescribed inclusion probabilities
pik=c(0.2,0.7,0.8,0.5,0.4,0.4)
#select a sample
s=UPrandomsystematic(pik)
#the sample is
(1:length(pik))[s==1]

[Package sampling version 0.3 Index]