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startp
2013 Apr 26
1
Stratified Random Sampling Proportional to Size
...RET_TYP_CD_LL FROM PS_EMPLOYEES_LL WHERE EMPL_STATUS NOT IN('R','T') ORDER BY APPT_TYP_CD_LL, EMPL_TYPE")
#ROWID is a dummy ID I added and repositioned after the strat columns for later use
CURRPOP$ROWID<-seq(nrow(CURRPOP))
CURRPOP<-CURRPOP[,c(1:2,11,3:10)]
# My strata. Stratp is how many I want to sampled from each strata. NOTE THERE ARE SOME 0's which just means I won't sample from that group.
stratum_cp<-sqldf("SELECT APPT_TYP_CD_LL,EMPL_TYPE, count(*) HC FROM CURRPOP GROUP BY APPT_TYP_CD_LL,EMPL_TYPE")
stratum_cp$stratp<-round(stratum_cp$HC/nr...