WgtEff (version 0.1.2)

ESS: Calculate ESS

Description

Calculates effective sample size (ESS)

Usage

ESS(x)

Arguments

x

= weights vector (name of weights column)

Value

Effective sample size (ESS)

References

Effective sample size (ESS) => sum(x)^2 / sum(x^2)

Examples

# NOT RUN {
ESS(testweights$weights_column)
# }