inclusionprobabilities {sampling} | R Documentation |
Inclusion probabilities
Description
Computes the first-order inclusion probabilities from a vector of positive numbers
(for probability proportional-to-size sampling).
Usage
inclusionprobabilities(a,n)
Arguments
a |
vector of positive numbers. |
n |
sample size. |
See Also
inclusionprobastrata
Examples
############
## Example 1
############
# a vector of positive numbers
a=1:20
# computation of the inclusion probabilities for a sample size n=12
pik=inclusionprobabilities(a,12)
pik
############
## Example 2
############
# Computation of the inclusion probabilities proportional to the number
# of inhabitants in each municipality of the Belgian database.
data(belgianmunicipalities)
pik=inclusionprobabilities(belgianmunicipalities$Tot04,200)
# the first-order inclusion probabilities for each municipality
data.frame(pik=pik,name=belgianmunicipalities$Commune)
# the inclusion probability sum is equal to the sample size
sum(pik)
[Package
sampling version 2.1
Index]