Hi Jim,
Thanks for the suggestion. What I understand is trying something like
tryCatch(nlme(conc~f2(dose,Theta1,Theta
2,Theta3,t),
fixed=Theta1+Theta2+Theta3~1,
data=grouped.data,
random=Theta1+Theta2+Theta3~1,
start=list(fixed=ini.pkpara))
)
Is that correct?
Once again thanks.
Regards,
Jamil.
On 6 April 2014 23:51, Jim Lemon <j...@bitwrit.com.au> wrote:
> On 04/06/2014 08:21 PM, Naser Jamil wrote:
>
>> Dear R-user,
>> May I seek your suggestion on an issue. I'm fitting non-linear mixed
>> effects
>> model as a part of my large R program. But sometimes I get error messages
>> from it and the code stops working. In such cases, I want to skip the
>> iterations and
>> want to move to the next iteration ignoring all the subsequent
>> computations.
>>
>> The following is only that part of the code which fits the mixed effects
>> model. I tried with "tryCatch" as shown below, but it's not serving my
>> purpose. I guess something is wrong in my approach.
>>
>> ###########################################################
>>
>> grouped.data<-groupedData(formula = conc ~ t | subject,
>> data = data.d)
>> model.d<-nlme(conc~f2(dose,Theta1,Theta2,Theta3,t),
>> fixed=Theta1+Theta2+Theta3~1,
>> data=grouped.data,
>> random=Theta1+Theta2+Theta3~1,
>> start=list(fixed=ini.pkpara))
>> summ<-summary(model.d) # summary of the model
>>
>> tryCatch(summ, error = function() next)
>>
>> ###########################################################
>>
>> Hi Jamil,
> I think you have to pass the expression:
>
> nlme(conc~f2(dose,Theta1,Theta2,Theta3,t),
> fixed=Theta1+Theta2+Theta3~1,
> data=grouped.data,
> random=Theta1+Theta2+Theta3~1,
> start=list(fixed=ini.pkpara))
>
> not the result of the expression.
>
> Jim
>
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