From: Katrin Volz <*ankekatrin.volz*>

Date: Tue, 28 Jul 2015 08:07:56 +0200

Dear Bill, dear all

Thanks so much for your answer.

More concrete I would like to model blood pressure including a circadian

rhythm. Therefore I would like to use a sine or cosine function with =

‘T’

instead of ‘Time’.

SinfS = ( 1 + Amplitude * sin ( (2*PI/Period) * (T-Phase) ) ) ; sine =

or

cosine function

SBP = (SBas + SinfS) * (1-EffS)

; SBP = systolic blood pressure, SBas = Baseline systolic blood =

pressure,

(1-EffS = effect)

I could also model this effect using a turnover model and avoid this

problem, but I would like to evaluate this kind of PD model (if there is =

any

meaningful way to code).

I also had the idea to code this sine function as a function of time in =

a

compartment and rename this compartment in $Error, but I am not sure if

there is any way to do this.

Thanks again and best regards.

Katrin

Von: Denney, William S. [mailto:William.S.Denney

Gesendet: 27 July 2015 17:34

An: Katrin Volz <ankekatrin.volz

nmusers

Betreff: RE: [NMusers] Time 'T' in $Error

Hi Katrin,

$ERROR is executed once per data row. The time when $ERROR is run is =

the

TIME value (the discrete times of the measurement). For this specific

example, you can just use TIME. You will need to code your $DES block =

so

that what you’re wanting to integrate as a function of time is in a

compartment amount (e.g. A(1)). With your example, it’s hard to see =

how T

is used in the $DES, but perhaps you could share the real example to =

give a

bit more concrete advice on how to integrate the answer into your code.

Thanks,

Bill

From: owner-nmusers

[mailto:owner-nmusers

Sent: Monday, July 27, 2015 10:46 AM

To: nmusers

Subject: [NMusers] Time 'T' in $Error

Dear NMuser,

I would like to model a PD effect using a function which includes =

continuous

time ‘ T ’.

The PD Effect is coded in $Error.

In general like this:

$ERROR

MyFunction = xxx + T

PDEffect = Basline * MyFunction

But ‘T’ cannot be used in $Error.

I tried to code the function with ‘T’ in $DES and rename it to use =

it in

$ERROR:

$DES

MyFunction = xxx + T

$ERROR

MyNewFunction = MyFunction

PDEffect = Baseline * MyNewFunction

but it didn’t worked (to rename was not permitted by NONMEM).

Does anyone of you has an idea how to solve this problem?

Thanks and best regards.

Katrin

Anke-Katrin Volz

PhD Student

Saarland University

Clinical Pharmacy

Campus C2 2 | Room 0.31

D- 66123 Saarbrücken

mail ankekatrin.volz

<mailto:ankekatrin.volz

fon +49 [0]681 302 22 84

fax +49 [0]681 302 70 258

www.clinicalpharmacy.me <http://www.clinicalpharmacy.me>

Received on Tue Jul 28 2015 - 02:07:56 EDT

Date: Tue, 28 Jul 2015 08:07:56 +0200

Dear Bill, dear all

Thanks so much for your answer.

More concrete I would like to model blood pressure including a circadian

rhythm. Therefore I would like to use a sine or cosine function with =

‘T’

instead of ‘Time’.

SinfS = ( 1 + Amplitude * sin ( (2*PI/Period) * (T-Phase) ) ) ; sine =

or

cosine function

SBP = (SBas + SinfS) * (1-EffS)

; SBP = systolic blood pressure, SBas = Baseline systolic blood =

pressure,

(1-EffS = effect)

I could also model this effect using a turnover model and avoid this

problem, but I would like to evaluate this kind of PD model (if there is =

any

meaningful way to code).

I also had the idea to code this sine function as a function of time in =

a

compartment and rename this compartment in $Error, but I am not sure if

there is any way to do this.

Thanks again and best regards.

Katrin

Von: Denney, William S. [mailto:William.S.Denney

Gesendet: 27 July 2015 17:34

An: Katrin Volz <ankekatrin.volz

nmusers

Betreff: RE: [NMusers] Time 'T' in $Error

Hi Katrin,

$ERROR is executed once per data row. The time when $ERROR is run is =

the

TIME value (the discrete times of the measurement). For this specific

example, you can just use TIME. You will need to code your $DES block =

so

that what you’re wanting to integrate as a function of time is in a

compartment amount (e.g. A(1)). With your example, it’s hard to see =

how T

is used in the $DES, but perhaps you could share the real example to =

give a

bit more concrete advice on how to integrate the answer into your code.

Thanks,

Bill

From: owner-nmusers

[mailto:owner-nmusers

Sent: Monday, July 27, 2015 10:46 AM

To: nmusers

Subject: [NMusers] Time 'T' in $Error

Dear NMuser,

I would like to model a PD effect using a function which includes =

continuous

time ‘ T ’.

The PD Effect is coded in $Error.

In general like this:

$ERROR

MyFunction = xxx + T

PDEffect = Basline * MyFunction

But ‘T’ cannot be used in $Error.

I tried to code the function with ‘T’ in $DES and rename it to use =

it in

$ERROR:

$DES

MyFunction = xxx + T

$ERROR

MyNewFunction = MyFunction

PDEffect = Baseline * MyNewFunction

but it didn’t worked (to rename was not permitted by NONMEM).

Does anyone of you has an idea how to solve this problem?

Thanks and best regards.

Katrin

Anke-Katrin Volz

PhD Student

Saarland University

Clinical Pharmacy

Campus C2 2 | Room 0.31

D- 66123 Saarbrücken

mail ankekatrin.volz

<mailto:ankekatrin.volz

fon +49 [0]681 302 22 84

fax +49 [0]681 302 70 258

www.clinicalpharmacy.me <http://www.clinicalpharmacy.me>

Received on Tue Jul 28 2015 - 02:07:56 EDT