Re: [R] optim function

From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.be>
Date: Thu 11 May 2006 - 21:06:37 EST

probably you want to look at ?try; I hope it helps.

Best,
Dimitris



Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium

Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://www.med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm



> Hello,
>
> I want to use optim with simulated data.
> My program generates a sample and then calls optim to optimise a
> function
> that depends on the generated sample.
>
> I want to do this with 100 samples. But optim does not 'work' for
> the 100
> samples, sometimes I get a message saying that sigma matrix was not
> invertible and therefore the optimisation was not carried out, and
> then my
> program breaks.
>
> Is there any way to implement a condition to avoid this? I mean, how
> can I
> specify that if this is the case, ignore such sample and try with
> the next
> one.
>
> Many thanks for your help
>
> Raquel
>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu May 11 21:08:56 2006

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