Re: [R] optim function

From: Dimitris Rizopoulos <>
Date: Thu 11 May 2006 - 21:06:37 EST

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


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

> 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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Disclaimer: mailing list PLEASE do read the posting guide! Received on Thu May 11 21:08:56 2006

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