[NMusers] Questions about M3

2010-04-29 Thread Xiao Hu
1 Y=CUMD ENDIF $THETA -1.868;[KA] 11.9 ;[V] 10;[CL] 0.523;[SD] $OMEGA 0.258 0.177 0.227 $SIGMA 1 FIX $EST METHOD=COND LAP INTERACTION MAXEVAL= PRINT=5 FILE=PK.LOG.COND.ext Sample Data for code 1: Sample Data for code 2: Best regards, Xiao Hu (Shelley), Ph.D. Scientist

[NMusers] Translate ALAG1 and D1 in ADVAN2 to differential equations

2010-08-10 Thread Xiao Hu
: $THETA 12 ;THETA5 8.89 ;THETA6 0.0015;THETA8 0.263 ; THETA9 2.87; THETA11 Best regards, Shelley ======== Xiao Hu (Shelley), Ph.D. Scientist, Development Pharmacokinetics & Disposition Biogen Idec, Inc. 14 Cambridge Center Cambridge, MA 02142

Re: [NMusers] Translate ALAG1 and D1 in ADVAN2 to differential equations

2010-08-10 Thread Xiao Hu
DED. Best regards, Shelley ==== Xiao Hu (Shelley), Ph.D. Scientist, Development Pharmacokinetics & Disposition Biogen Idec, Inc. 14 Cambridge Center Cambridge, MA 02142 Luann Phillips 10-Aug-2010 01:29 PM Message Size: 6.6 KB To Xiao Hu cc nmusers Sub

RE: [NMusers] Hessian of posterior density is non positive definite during search

2010-10-29 Thread Xiao Hu
first. It's work in progress. 3. ALAG may have caused problem, especially with differential equation, along with ETA. Best regards, Shelley ======== Xiao Hu (Shelley), Ph.D. Scientist, Development Pharmacokinetics & Disposition Biogen Idec, Inc. 14 Ca

RE: [NMusers] Hessian of posterior density is non positive definite during search

2010-11-01 Thread Xiao Hu
Ann, Because you already log-tranformed your data, you may want to change SIG1*IPRED to SIG1 for DUM. I'm guessing the combination of ALAG and SIG1*IPRED is causing problem. DUM = (LOQ-IPRED)/(SIG1) Best regards, Shelley Xiao Hu (Shelley),

[NMusers] Summer Intern at Biogen Idec

2011-04-01 Thread Xiao Hu
Dear Graduate candidates, We have a summer internship in Biogen Idec for an M&S project. It's posted at ACOP website. For more details, please visit http://www.go-acop.org/2011/job-postings. Best regards, Shelley ==== Xiao Hu (Shelley), Ph.

[NMusers] Question Re Calling nmfe7 from R

2011-05-04 Thread Xiao Hu
g for an answer for my IT rep for two weeks and am wondering if I can get some guidance from our discussion group. Best regards, Shelley Xiao Hu (Shelley), Ph.D. Senior Scientist, Clinical Pharmacology and Pharmacometrics Biogen Idec, Inc. 14 Camb

RE: [NMusers] Question Re Calling nmfe7 from R

2011-05-05 Thread Xiao Hu
, and fixed the system environment variables. Now I'm able to run NONMEM in both DOS command window and R. Best regards, Shelley Xiao Hu (Shelley), Ph.D. Senior Scientist, Clinical Pharmacology and Pharmacometrics Biogen Idec, Inc. 14 Cambridge

Re: [NMusers] Table formatting in NONMEM7- can I skip the "Table No." header row?

2011-05-18 Thread Xiao Hu
, Shelley ==== Xiao Hu (Shelley), Ph.D. Senior Scientist, Clinical Pharmacology and Pharmacometrics Biogen Idec, Inc. 14 Cambridge Center Cambridge, MA 02142 Nick Holford Sent by: owner-nmus...@globomaxnm.com 18-May-2011 05:22 AM Message Size: 16.7 KB To nmusers cc Subject Re: [NMuse

[NMusers] Modeling Hemodialysis clearance

2011-07-20 Thread Xiao Hu
Dear NM users, I'm working on a PK model in renal disease patients with hemodialysis. The drug in healthy subjects is well described with a first-order absorption and one-compartment disposition model. A third hemodialysis compartment was added; CMT=3 or -3 were included in the data set to tu

RE: [NMusers] Modeling Hemodialysis clearance

2011-07-20 Thread Xiao Hu
AM To: Xiao Hu Cc: nmusers@globomaxnm.com Subject: Re: [NMusers] Modeling Hemodialysis clearance Xiao Hu, I think it may be a problem with identifiability. It can't separate the definition of K23 from K20 unless there are measurements during elimination for hemo. patients off dialysis a

RE: [NMusers] Modeling Hemodialysis clearance

2011-07-21 Thread Xiao Hu
.com] Sent: Wednesday, July 20, 2011 12:54 PM To: nmusers@globomaxnm.com Cc: Xiao Hu Subject: Re: [NMusers] Modeling Hemodialysis clearance Dear Xiao, I agree with Jun's advise. You previous setting should not work as when you switch the compartment 3 off nothing changes for compartment 2

RE: [NMusers] Modeling Hemodialysis clearance

2011-07-21 Thread Xiao Hu
ssage- From: Luann Phillips [mailto:luann.phill...@cognigencorp.com] Sent: Thursday, July 21, 2011 10:32 AM To: Xiao Hu Cc: nmusers@globomaxnm.com Subject: Re: [NMusers] Modeling Hemodialysis clearance Xiao Hu, The concept of turning on/off compartments was presented to me in the contex

FW: [NMusers] Modeling Hemodialysis clearance

2011-07-27 Thread Xiao Hu
Sent: Thursday, July 21, 2011 3:08 PM To: Xiao Hu Cc: Bauer, Robert Subject: FW: [NMusers] Modeling Hemodialysis clearance Hi Xiao, If the hemodialysate is being directly analyzed then the ON/OFF feature can be used as for urine. However, if the hemodialysate is not being directly analyzed, I a

[NMusers] Self-abort/protective code for bootstrapping

2011-07-28 Thread Xiao Hu
R can start the next run? Best regards, Shelley ===== Xiao Hu (Shelley) Senior Scientist Clinical Pharmacology and Pharmacometrics Department of Translational Medicine Biogen Idec, 14 Cambridge Center, Cambridge, MA 02142

RE: [NMusers] lagged absorption and empirical input function

2011-07-28 Thread Xiao Hu
Dear Pierre-Olivier, I think once you defined ALAG(1)=THETA() (as Luann suggested), the system will delay your input. You don't have to specify anything in the $DES block. It's worth trying. $PK ALAG(1)=THETA() $DES DADT(1)=(DOSE/V)*INPUT-K*A(1) Best regards, Xiao (Shelley) -Orig

RE: [NMusers] lagged absorption and empirical input function

2011-07-28 Thread Xiao Hu
o:jun.shen...@gmail.com] Sent: Thursday, July 28, 2011 12:27 PM To: Xiao Hu Cc: Tremblay, Pierre-Olivier; Luann Phillips; nmusers@globomaxnm.com Subject: Re: [NMusers] lagged absorption and empirical input function Dear all, This issue is worth a bit more discussion. My understanding about ALAG is, for ex

[NMusers] ERROR IN WRITING FILE : ADDITIONAL OUTPUT FILE (IOUNIT) USED IN ZXMIN1_WRITE

2012-09-17 Thread Xiao Hu
Dear NMusers, I'm working on some Phase 3 PK data, which has >30,000 records. I got an error message and did not have a clue what it means. I'm wondering if anyone can give me some suggestions. Kindest regards, Xiao The end of the output from nonmem: #METH: First Order MONITORING OF SEARCH:

[NMusers] ERROR IN READING FILE : MSF FILE USED BY INEST

2012-09-28 Thread Xiao Hu
Dear NMusers, I'm trying to run simulation using MSF file, but got the following error message: "ERROR IN READING FILE : MSF FILE USED BY INEST" Can anyone give me a hint on what it means and how to fix it? I'd really appreciate it. Kindest regards, Xiao $PROBLEM PK Model $INPUT CMM STUDY ID