Hi!! I would like to know if there is some functions in R to build fractional designs. So far, I have only arrived to find the model.matrix function. Is there anybody that has ported the fac.design or oa.design to R? cheers, and thanks in advance, IOsu -- Jesus Maria Frias Celayeta, PhD. Process Engineering Department University College Cork,Cork Ireland phone: 353-21-903096 fax: 353-21-270249 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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 _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._