UPpivotal {sampling} | R Documentation |
Select an unequal probability sample by means of the pivotal method (unequal probabilities, without replacement, fixed sample size).
UPpivotal(pik,eps=1e-12)
pik |
vector of prescribed inclusion probabilities. |
eps |
the control value, by default equal to 1e-12. |
Return a vector (0 and 1) of size N, where N is the population size. The value eps is used to control pik (pik>eps & pik < 1-eps).
Deville, J.-C. and Tillé, Y. (1998),
Unequal probability sampling without replacement through a splitting method,
Biometrika, 85:89-101.
Chauvet, G. and Tillé, Y. (2004). A fast algorithm of balanced sampling. Submitted for publication.
#define the prescribed inclusion probabilities pik=c(0.2,0.7,0.8,0.5,0.4,0.4) #select a sample UPpivotal(pik)