R: Wrappers for specifying PPS designs

HR {survey}

R Documentation

Wrappers for specifying PPS designs

Description

The Horvitz-Thompson estimator and the Hartley-Rao approximation require information in addition to the sampling probabilities for sampled individuals. These functions allow this information to be supplied.

Usage

HR(psum=NULL, strata = NULL)
ppsmat(jointprob, tolerance = 1e-04)

Arguments

`psum`	The sum of squared sampling probabilities for the population, divided by the sample size, as a single number or as a vector for stratified sampling
`strata`	Stratum labels, of the same length as `psum`, if `psum` is a vector
`jointprob`	Matrix of pairwise sampling probabilities for the sampled individuals
`tolerance`	Tolerance for deciding that the covariance of sampling indicators is zero

Value

An object of class HR or ppsmat, suitable for supplying as the pps argument to svydesign.

Examples

HR(0.1)