Dear Sir, Here is my question: if i have a table like <<...OLE_Obj...>> How can I creat a boxplot with data (parameter) grouped by "lot number" and x axis is ordered by "date"? I know that boxplot(split(parameter, lot number) ) will give you the plot group by "lot number". however, the x axis will also be ordered by "lot number" in this case. Thanks! Hai-An Lin Systems Agere Yield Improvement Engineering Phone:610-712-8702 Fax:610-712-6327 Addr:24D-214 AK 555 Union Boulevard Allentown, PA 18109 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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 _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._