ppssstrat {pps} | R Documentation |
In each stratum, select a sample using pps systematic sampling
ppssstrat(sizes,stratum,n)
sizes |
A vector of the sizes of the units in the population, sorted by stratum |
stratum |
A vector of stratum codes, in the same order |
n |
A vector containing the sample size in each stratum |
Returns the indices of the units that were selected in the sample
ppssstrat
calls ppss
once per stratum.
See the user's guide, pps.pdf, for more information.
sizes <- c(1:5,10:6)*10 strat <- c(1,1,1,2,2,3,3,3,3,3) n <- c(2,1,3) ppssstrat(sizes,strat,n)