Bioequivalence and Bioavailability Forum • Avoid partial replicate designs, pleeeze!

Avoid partial replicate designs, pleeeze! [🇷 for BE/BA]

posted by ElMaestro – Denmark, 2020-07-11 16:43 (1383 d 21:05 ago) – Posting: # 21673
Views: 17,734

Hi again,

it is rather experimental.
I do not have a level of understanding that allows me to use V=ZGZ^t+R,
so I will be constructing V directly from the data listing without the intermediary Z and G. I do not wish to get bogged down by the various aspects of covariance matrices; if CSH does not pan out well in SAS then it is an implenetation or convergence issue only, it is not because CSH is irrelevant. CSH is for all practical purposes the covariance matrix that makes sense, which means we have:
A variance for T (combined within and between)
A variance for within-R
A variance for between-R

Hessian, positive definite, etc.. all this comes down to the details of SAS's or WinNonlin's optimiser. I am playing around with optim in R (BFGS, L-BFGS-B bounded, and Nelder-Mead) and with one of my own making.

—
Pass or fail!
ElMaestro

Complete thread:

Semireplicated + REML in R ElMaestro 2020-07-10 13:19
- Semireplicated + REML in R Helmut 2020-07-10 19:03
  - Semireplicated + REML in R ElMaestro 2020-07-10 19:24
    - Avoid partial replicate designs, pleeeze! Helmut 2020-07-11 11:57
      - Avoid partial replicate designs, pleeeze!ElMaestro 2020-07-11 14:43
        
        Braveheart! Helmut 2020-07-11 15:38
        
        Who can help? ElMaestro 2020-07-12 12:28
        
        Who can help? ElMaestro 2020-07-12 13:26
        Update II ElMaestro 2020-07-12 21:36
        
        Update III ElMaestro 2020-07-12 21:46
        
        Final update today ElMaestro 2020-07-12 22:27
        
        Medium rare. Helmut 2020-07-13 13:52
        
        took just 52 hrs to do it :-) ElMaestro 2020-07-13 14:18
        
        Will take much more hours still… Helmut 2020-07-13 15:34
        
        Negative determinant ElMaestro 2020-07-14 03:22
        
        Are we loosers? Helmut 2020-07-14 13:58
        
        "we"? Loosers? ElMaestro 2020-07-14 15:07
        
        Misunderstanding? Helmut 2020-07-14 15:32
        
        Braveheart! ElMaestro 2020-07-13 10:13
        
        Braveheart! Helmut 2020-07-13 14:16
        Braveheart! PharmCat 2020-07-15 14:19
        
        Braveheart! ElMaestro 2020-08-02 17:39
- We were all blind (except Detlew) Helmut 2020-07-15 14:27
  - It is the opposite way around for me ElMaestro 2020-07-15 16:25
    - Desultory thoughts Helmut 2020-07-15 17:33
      - FDA RSABE is ISC d_labes 2020-07-15 18:13
        
        FDA RSABE is ISC Helmut 2020-07-16 11:11
      - Desultory thoughts ElMaestro 2020-07-15 23:06
        
        Desultory thoughts Helmut 2020-07-16 10:59
  - Phoenix - which template? mittyri 2020-07-19 00:42
    - FDA RSABE Project template_ v1.4.phxproj Helmut 2020-07-19 01:45
- "By popular demand": likelihood ElMaestro 2020-07-24 10:07
  - And by the way.... ElMaestro 2020-07-24 12:52
    - And by the way.... PharmCat 2020-08-03 14:24
      - Not understood ElMaestro 2020-08-03 22:55
        
        Not understood PharmCat 2020-08-05 01:41
        
        Not understood ElMaestro 2020-08-05 08:13
        
        Not understood PharmCat 2020-08-05 16:37
        
        Open issues ElMaestro 2020-08-06 21:11
        
        Open issues PharmCat 2020-08-07 00:02
        
        Open issues ElMaestro 2020-08-07 07:49
        
        Open issues PharmCat 2020-08-07 11:29
        
        Still can't make it work ElMaestro 2020-08-07 13:08
        
        Still can't make it work PharmCat 2020-08-07 15:42
        
        Still can't make it work ElMaestro 2020-08-07 16:44
        
        Still can't make it work PharmCat 2020-08-07 18:14
        
        Still can't make it work ElMaestro 2020-08-07 18:23
        
        And now it works ElMaestro 2020-08-07 21:31
        Still can't make it work PharmCat 2020-08-08 01:08
        
        Speed improvement ElMaestro 2020-08-08 12:25
        
        Speed improvement PharmCat 2020-08-08 17:27
        Speed improvement ElMaestro 2020-08-08 18:10
        
        Speed improvement PharmCat 2020-08-09 18:22
        Some tests... PharmCat 2020-08-10 11:48