On Thu, Oct 21, 2010 at 8:52 AM, toby dunn <tobydunn@hotmail.com> wrote: > The proper way to do the Mean Procedure, I stuck with the Class statement because one doesn't have to have it sorted like in the previous Data Step Statement. > However, that means I had to use the Where data step option on the resulting data set.: > > Proc Means > Data = Psy NoPrint ; > Class Student_Id ; > Var Hours GPA ; > ID ACT ; > OutPut Out = Need3 ( Drop = _Type_ _Freq_ > Where = ( Not Missing( Student_ID ) ) ) > Mean = Hours_mean GPA_mean ; > Run ;

Can you explain this a bit more for us commoners. What is different about MEANS that a WHERE data set option is needed? Couldn't you use virtually then same syntax for either MEANS or SUMMARY, e.g. NWAY.