Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

2 Pages<12
Options
Go to last post Go to first unread
Offline Jean Giraud  
#21 Posted : 21 January 2020 17:22:35(UTC)
Jean Giraud


Rank: Advanced Member

Groups: Registered
Joined: 04/07/2015(UTC)
Posts: 4,676
Canada

Was thanked: 792 time(s) in 628 post(s)
Carlos, my dear friend,
SS 6179 has found his Waterloo from your latest LM algo style,
but works fine from your original [2018] piece wise.
Seemingly the matter is some numerical issue,
but couldn't doctor that poisoned patient.
You know: can't doctor a stone ... too dead for too long !
No more worry, all the fits in my collection are done.
Still, LM is interesting.
Cheers ... Jean, take care and always be good.

Unsolved LM SS 6179.sm (135kb) downloaded 10 time(s).
Offline CBG  
#22 Posted : 22 January 2020 06:09:44(UTC)
CBG


Rank: Advanced Member

Groups: Registered
Joined: 14/10/2015(UTC)
Posts: 251

Was thanked: 61 time(s) in 45 post(s)
Dear friend Jean.
The problem in the calculation of the second LM algorithm in SS6179
occurs in the calculation of the Jacobian matrix for finite differences,
since in this step, after several iterations, for over unknown reasons an
overflow error occurs (possibly a calculation engine error ).
I have slightly modified the LMSA function and I have been able to solve the
problem indicated with 4 data. The solution that uses all the data is not possible in SS6179.

Solve_LMSA_SS6179.png

Solved LM SS 6179.sm (148kb) downloaded 12 time(s).


I hope you feel comfortable with this.


Best Regards

Carlos
thanks 1 user thanked CBG for this useful post.
on 22/01/2020(UTC)
Offline Jean Giraud  
#23 Posted : 22 January 2020 18:23:25(UTC)
Jean Giraud


Rank: Advanced Member

Groups: Registered
Joined: 04/07/2015(UTC)
Posts: 4,676
Canada

Was thanked: 792 time(s) in 628 post(s)
Originally Posted by: CBG Go to Quoted Post
I hope you feel comfortable with this.

Thanks Carlos for doctoring LMSA SS 6179.
You are right: some numerical issues between versions.
That was most noticed between the two SS 5346 Official
and SS 5346 UNofficial ... this version cured all "Official"
Included in the next Compendium Genfit Classroom Essentials
Cheers ... Jean

Genfit_11 Pharmacokinetics LMSA ... LM.sm (77kb) downloaded 10 time(s).
Offline Jean Giraud  
#24 Posted : 23 January 2020 19:31:42(UTC)
Jean Giraud


Rank: Advanced Member

Groups: Registered
Joined: 04/07/2015(UTC)
Posts: 4,676
Canada

Was thanked: 792 time(s) in 628 post(s)
Hola, Carlos.
These two reconciliations [piecewise/global] work fine.
Will test more on hard fit.
Cheers ... Jean ... Thanks

Genfit_11 Pharmacokinetics LMSA ... [Carlos 2020].sm (51kb) downloaded 14 time(s).
Genfit_12 Pharmacokinetics LM ... [Carlos 2018].sm (44kb) downloaded 13 time(s).
Offline CBG  
#25 Posted : 24 January 2020 23:29:39(UTC)
CBG


Rank: Advanced Member

Groups: Registered
Joined: 14/10/2015(UTC)
Posts: 251

Was thanked: 61 time(s) in 45 post(s)
Originally Posted by: Jean Giraud Go to Quoted Post
Hola, Carlos.
These two reconciliations [piecewise/global] work fine.
Will test more on hard fit.
Cheers ... Jean ... Thanks



Hola Jean.

Thank you

Excellent job, it was possible to put the rattle on the cat!
but maybe it's time to migrate to the next version of SS.

Best Regards

Carlos
Users browsing this topic
2 Pages<12
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.