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chidambarajoshi ★ Hyderabad-INDIA, 2008-08-27 13:25 (6508 d 20:25 ago) Posting: # 2257 Views: 5,892 |
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Dear all, Can any body clarify the diiferences of following in SAS? Sequence by Group, Sequence * Group, period(within group), subject(within sequence by group),period nested within group Regards, Joshi — Best Regards Joshi |
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JPL ☆ Vienna, 2008-08-28 11:10 (6507 d 22:41 ago) @ chidambarajoshi Posting: # 2266 Views: 4,555 |
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Dear Joshi, "by" stands for an interaction, and is programmed in SAS by "*" "within" stands for nesting and is programmed by "()", Thus, 1) Sequence by Group: is the interaction of group and sequence 2) Sequence * Group: is the same as 1) 3) period(within group): is the period nested in group 4) subject(within sequence by group): is the subject nested in the interaction of sequence and group 5) period nested within group: is the period nested in group It's all something different (despite 1) and 2)), however, I think, that 3) and 5) don't make much sense and 4) is an extreme special case and very difficult to interpret. Regards, JPL |
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chidambarajoshi ★ Hyderabad-INDIA, 2008-08-30 12:07 (6505 d 21:44 ago) @ JPL Posting: # 2284 Views: 4,470 |
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Dear JPL, Thanks for the clarification regards, Joshi  — Best Regards Joshi |
Ing. Helmut Schütz