RE: [NMusers] Probit function in NONMEM

Thanks to Bill and Samer for their kind help. I want to point out that
the current NONMEM help for PHI function is wrong. PHI(X) is always the
integral from -INF to X of N(0,1) whether X is >0 or <0.
 
Yaning


Yaning Wang, Ph.D.
Team Leader, Pharmacometrics
Office of Clinical Pharmacology
Office of Translational Science
Center for Drug Evaluation and Research
U.S. Food and Drug Administration
Phone: 301-796-1624
Email: yaning.wang_at_fda.hhs.gov

"The contents of this message are mine personally and do not necessarily
reflect any position of the Government or the Food and Drug
Administration."


-----Original Message-----
From: Bill Gillespie [mailto:billgillespie_at_nc.rr.com]
Sent: Saturday, September 22, 2007 1:16 PM
To: Wang, Yaning
Cc: nmusers_at_globomaxnm.com
Subject: Re: [NMusers] Probit function in NONMEM

Hi Yaning,

See the PHI function in the NONMEM help:

> ___________________________________________________________________
> | |
> | PHI |
> |_________________________________________________________________|
>
> MEANING: PHI function
> CONTEXT: NONMEM utility routine
>
> USAGE:
> DOUBLE PRECISION PHI,X,CUMDIS
> C (If single precision is to be used):
> C REAL PHI,X
> CUMDIS= PHI(X)
>
> DISCUSSION:
> Gives the value of the cumulative distribution function.
>
> For X < 0, this is the integral from -INF to X of N(0,1).
> For X > 0, this is the integral from X TO INF of N(0,1).
> For X=0, this is .5.
>
> Input argument:
>
> X
>
> REFERENCES: None.
>
Regards,
Bill

Wang, Yaning wrote:
> Dear all:
> Is there a Probit function in NONMEM we can directly use?
> Thanks
> Yaning
>
>
> Yaning Wang, Ph.D.
> Team Leader, Pharmacometrics
> Office of Clinical Pharmacology
> Office of Translational Science
> Center for Drug Evaluation and Research
> U.S. Food and Drug Administration
> Phone: 301-796-1624
> Email: yaning.wang_at_fda.hhs.gov
>
> "The contents of this message are mine personally and do not
necessarily
> reflect any position of the Government or the Food and Drug
> Administration."
>
>
>


Received on Sun Sep 23 2007 - 23:18:53 EDT