STRATENUM: Enumeration Algorithm

In stratvns: Optimal Stratification in Stratified Sampling

Description

This function enumerates all feasible solutions to the stratification problem and produces the global optimum, applying an integer formulation proposed by Brito et al (2015).

Usage

STRATENUM(X, L, cvt = 0.1, nhmin = 2)

Arguments

X	Stratification Variable
L	Number of strata
cvt	Target cv
nhmin	Mininum sample size by stratum

Details

STRATENUM

Value

n	Sample size
nh	Sample size by strata
cv	coefficient of variation
Nh	Strata sizes
Vh	Strata variances
totoptg	Total global optimal solutions
tfeasible	Total feasible solutions
cputime	Runtime in seconds

Author(s)

Leonardo de Lima, Jose Brito, Pedro Gonzalez and Breno Oliveira

References

1. Brito, J.A.M., Silva, P.L.N., Semaan, G.S., Maculan, N., 2015. Integer programming formulations applied to optimal allocation in stratified sampling. Survey Methodology 41, 2, 427–442.

Examples

## Not run: 
Example1:
s<-STRATENUM(U21,L=3,cvt=0.05)
Example2:
s<-STRATENUM(U15,L=4)
Example3:
s<-STRATENUM(U1,L=3,nhmin=4)

## End(Not run)

stratvns documentation built on July 9, 2020, 5:10 p.m.