Bioequivalence and Bioavailability Forum

G matrix [General Sta­tis­tics]

posted by d_labes  – Berlin, Germany, 2011-05-03 10:26 (5522 d 16:20 ago) – Posting: # 6978
Views: 13,725

Dear J. Detlor!

❝ d_labes this is an excellent reply IMHO.

Thanks for the flowers.

❝ The only addition I would make would be to point out that the SUBJ= option in the RANDOM statement is absent from the second set of code.

❝ ...

❝ If we ignore this option in the RANDOM statement we are assuming the data is from 1 subject only, and thus the G matrix is not in a block-diagonal format.

Really?

I got the G matrix for the second code set (armcd renamed to sequence) for the above mentioned Example 9.3.3 in Chow/Liu - a 2-sequence-3-period replicate study as:
                                Estimated G Matrix

 Row  Effect             sequence  subject    Col1      Col2     Col3    ...

   1  subject(sequence)  RTT        1       75.6238
   2  subject(sequence)  RTT        3                 75.6238
   3  subject(sequence)  RTT        4                           75.6238
...
                                        ...  Col10     Col11     Col12   ...
  10  subject(sequence)  TRR        2       75.6238
  11  subject(sequence)  TRR        5                 75.6238
  12  subject(sequence)  TRR        6                           75.6238
...

For me this looks block diagonal at its best .

Complete thread:

• Replicate Designs & IntraSubj CV randombadger 2011-04-28 13:02 
  • Replicate Designs & IntraSubj CV Helmut 2011-04-28 15:00
    • Replicate Designs & IntraSubj CV randombadger 2011-04-28 15:25
      • Replicate Designs & IntraSubj CV Helmut 2011-04-28 17:09
      • Inter-subject dance with the wolves d_labes 2011-04-29 11:33
        • How many subjects? jdetlor 2011-05-02 18:21
          • G matrixd_labes 2011-05-03 08:26
            • G matrix ElMaestro 2011-05-03 09:15
              • G matrix d_labes 2011-05-03 09:51
                • Results randombadger 2011-05-03 12:03
                  • Results - comments d_labes 2011-05-03 14:32
                    • Results - comments randombadger 2011-05-03 16:53
                      • Lost cents d_labes 2011-05-04 08:07
                • G matrix ElMaestro 2011-05-03 14:16
            • G matrix jdetlor 2011-05-03 19:37