UPbrewer {sampling} | R Documentation |
Brewer sampling
Description
Uses the Brewer's method to select a sample of units (unequal probabilities, without replacement, fixed sample size).
Usage
UPbrewer(pik,eps=1e-06)
Arguments
pik |
vector of prescribed inclusion probabilities. |
eps |
the control value, by default equal to 1e-06; it is used to
control pik (pik>eps & pik < 1-eps). |
Value
|
Returns a vector (with elements 0 and 1) of size N, the population size.
Each element k of this vector indicates the status of unit k
(1, unit k is selected in the sample; 0, otherwise). |
References
Brewer, K. (1975), A simple procedure for π pswor, Australian Journal of Statistics, 17:166-172.
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=UPbrewer(pik)
#the sample is
(1:length(pik))[s==1]
[Package
sampling version 2.3
Index]