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From: Jo Sugar on 18 Jul 2010 23:41 Hi! Question: I have a split plot design with "water" as main plot factor and "clones" as subplot factor. I will also like to fit an AR(1) for row and an ar(1)for plot. Is this code correct? proc mixed data = user.wue (where=(cropid=1)); class block water clone; model tch = water clone water*clone/ddfm=kr; random block block*water; repeated/type=sp(powa) (row plot) subject=intercept; run; Question: I also have multiple "cropid" and these crops are correlated. I would like to fit and AR(1) to the "cropid" too plus an AR(1) for rows and plots so I have a 3 way R structure. What is the correct code for this as I don't think this is correct: proc mixed data = user.wue; class cropid block water clone; model tch = water clone water*clone/ddfm=kr; random block block*water; repeated/type=sp(powa) (cropid row plot) subject=intercept; run; Thanks Jo

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