sampling (version 2.9)

cleanstrata: Clean strata

Description

Renumbers a variable of stratification (categorical variable). The strata receive a number from 1 to the last stratum number. The empty strata are suppressed. This function is used in `balancedstratification'.

Usage

cleanstrata(strata)

Arguments

strata

vector of stratum numbers.

See Also

balancedstratification

Examples

# definition of the stratification variable
strata=c(-2,3,-2,3,4,4,4,-2,-2,3,4,0,0,0)
# renumber the strata
cleanstrata(strata)