UPpoisson {sampling} | R Documentation |
Draw a Poisson sample, by using a prescribed vector of first order inclusion probabilities (unequal probabilities, without replacement, random sample size).
UPpoisson(pik)
pik |
vector of first order inclusion probabilities of size N. |
Return a vector of size N (N is the size population), indicating the unit status (0-unselected, 1-selected).
############ ## Example 1 ############ # definition of pik pik=c(1/3,1/3,1/3) # select a sample UPpoisson(pik) ############ ## Example 2 ############ data(belgianmunicipalities) Tot=belgianmunicipalities$Tot04 name=belgianmunicipalities$Commune n=200 pik=inclusionprobabilities(Tot,n) # select a sample s=UPpoisson(pik) as.vector(name[s==1])