RE: Block SIZE with SCM
Dear Jakob,
Thank you for your answer. According to PsN documentation PD = -100 means at
least 100 covariates. I tried with the exact number of covariates (PD = 105)
and I have the same issue.
Yes indeed, I can do it with the default value of PD = 50 because less than 50
are added but I was wondering if there exists a way if more than 50 covariates
are added during the forward path.
Best Regards,
Emeric Sibieude
Student trainee in Master's degree
Biopharma | R&D | Global Development | Translational Medicine
Merck
Lausanne , Switzerland
[email protected]<mailto:[email protected]>
Quoted reply history
From: Jakob Ribbing <[email protected]>
Sent: jeudi 5 décembre 2019 09:11
To: Emeric Sibieude <[email protected]>; [email protected]
Subject: Re: [NMusers] Block SIZE with SCM
Dear Emeric,
The code has negative PD, maybe PsN has problems interpreting this?
I am not sure how PD=-100 would be interpreted by NONMEM, but try PD=100,
instead.
I think this is what you intended to do?
As a side note, PsN (mainly to handle old nonmem versions) has functionality
for dropping (=DROP) covariates on $INPUT, if they are not tested in the
current model during SCM - but only among the ones listed in the configuration
as covariates.
Even if you test 50 covariates, it is not often more than ten different will be
included during forward inclusion, so possibly you can do with the default
PD=50?
Best wishes
Jakob
On 5 Dec 2019, at 08:39, Emeric Sibieude
<[email protected]<mailto:[email protected]>> wrote:
Dear NMUsers,
I am performing scm with PsN. My data have more than 50 covariates, this
should be processed by $SIZES PD=100 at the beginning of the NONMEM file.
However, it seems that scm command modifies this file by putting the block
$PROBLEM at the first line.
Here is the beginning of my code :
$SIZES LVR=150 PD=-100
SPROBLEM empty model
$DATA ID TIME AMT EVID DV CAT1 CAT2 ...
Here is the code transformed in the LST file
$SIZES LVR=150 PD=-100 $PROBLEM empty model
$DATA ID TIME AMT EVID DV CAT1 CAT2 ...
And at the end I have the following error
NM-TRAN MESSAGES
AN ERROR WAS FOUND IN THE CONTROL STATEMENTS.
AN ERROR WAS FOUND ON LINE 1 AT THE APPROXIMATE POSITION NOTED:
$SIZES LVR=150 PD=-100 $PROBLEM empty mod
X
THE CHARACTERS IN ERROR ARE: $
20 UNKNOWN OPTION.
Note that this is an issue for estimating the base model only. During the
forward path scm automatically drops the unnecessary covariates keeping only
the ones added at previous steps and the tested one. First estimate the base
model and use the option -base_ofv seems to work however I will have the same
issue if more than 50 covariates are added during the forward path.
Thank you in advance for any help or any suggestions.
Best Regards,
Emeric Sibieude
Student trainee in Master's degree
Biopharma | R&D | Global Development | Translational Medicine
Merck
Lausanne , Switzerland
[email protected]<mailto:[email protected]>
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