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Tips Talk:Missing Values in Classification Variables
looks good --Donh 00:37, 30 January 2009 (EST)
Did you want to mention this is PROC MEANS and SUMMARY?
Looks good to me. --Nancy 15:44, 2 February 2009 (EST)
User:Plf515 marked this as Tip Ready, commenting that it was a good tip. But that was done on the read more page instead of the Tips page. Moved that change to this page. --Donh 14:56, 21 February 2009 (EST)
I did not know about how PROC FORMAT worked when combining a missing level with a non-missing one, when used with PROC FREQ. Thanks. That's good to know.