Hi, sorry i have not beside this book `clara' is fully described in chapter 3 "of Kaufman and Rousseeuw (1990) " , but need suggestion's. Have anybody few words, how i have to interpret av_diss and isolation ? Is it statistical nonsens (cases are propertys from persons) recode nominal variables like "job positions" , "education" ... to binary variables 1/0 i.e. Manager/NoManager Worker/NoWorker ..... for clustering,because when i use eulidean metric only similar ordinal scales make sense without recoding. Additional for real-value's like age i do a z-transformation ? thanks for suggestions & regards, Christian -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._