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The GLM Procedure |
If your input data set is not sorted in ascending order, use one of the following alternatives:
Since sorting the data changes the order in which PROC GLM reads observations, the sorting order for the levels of the classification variables may be affected if you have also specified ORDER=DATA in the PROC GLM statement. This, in turn, affects specifications in CONTRAST and ESTIMATE statements.
If you specify the BY statement, it must appear before the first RUN statement or it is ignored. When you use a BY statement, the interactive features of PROC GLM are disabled.
When both BY and ABSORB statements are used, observations must be sorted first by the variables in the BY statement, and then by the variables in the ABSORB statement.
For more information on the BY statement, refer to the discussion in SAS Language Reference: Contents. For more information on the DATASETS procedure, refer to the discussion in the SAS Procedures Guide.
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