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`.

### See Also

election for examples of PPS designs

### Examples

    HR(0.1)

[Package survey version 3.19 Index]