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List: r-sig-mixed-models
Subject: Re: [R-sig-ME] Error in logLik.reStruct(object, conLin) : NA/NaN/Inf in foreign function call (arg 3
From: Ben Bolker <bbolker () gmail ! com>
Date: 2022-04-19 15:43:19
Message-ID: 1c116634-7d2a-9575-55a1-def36b39e790 () gmail ! com
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PS can you perhaps find a subset of women for which it *breaks*? e.g.
by bisection:
* run the model on the first half of the data (the first 5834 women)
* run the model on the second half of the data
see if either half gives the error. If so, subdivide the 'bad' half
of the data and continue ...
On 4/19/22 9:54 AM, Esan, Oluwaseun wrote:
> Dear List Members,
>
> I am relatively new to R and Mixed Effects Models using LME.
>
> I am unable to post sample data:
>
>
> I am trying to get the effect of pregnancy on lung function and age on women with \
> a certain genetic condition. We know lung function declines with age in people with \
> the condition but we do not know the effect pregnancy has on this relationship.
> I have repeat measurements of lung function measured up to 4 times in a year for up \
> to 14 years for each woman (A total of 331,722 observations for 11668 women).
> I am having problems when trying to add an exponential serial correlation to a \
> validated model.
> library(nlme)
>
> covariate 1= age
> M1<-lme(lung function~age +covariate1+covariate2+covariate3+ timesincepregnancy \
> ,data=df5,random=~1+age|id, na.action=na.exclude, method ="ML", \
> control=lmeControl(opt='optim'), corr=corExp(form=~age|id, nugget=T))
> The following error occurs:
>
> Error in logLik.reStruct(object, conLin) :
> NA/NaN/Inf in foreign function call (arg 3)
>
> When I run it on random sample of 40 women it runs without an error. Is there any \
> further processing I need to do on the data? I have already removed duplicates.
> Previous studies have shown exponential correlation structure is the best fit for \
> the data but I cannot seem to get this to work on the dataset I have.
> All the best,
> Seun
>
>
> [[alternative HTML version deleted]]
>
> _______________________________________________
> R-sig-mixed-models@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
--
Dr. Benjamin Bolker
Professor, Mathematics & Statistics and Biology, McMaster University
Director, School of Computational Science and Engineering
(Acting) Graduate chair, Mathematics & Statistics
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