[Ipmpack-users] survival and growth objects incorporating a random effect

[Joachim Paul Töpper]

Hi Christie!

I don't think there are any MakeGrowthObj and MakeSurvObj specifically 
for mixed effects models. But you can easily coerce the coef's (fixef or 
coefs for the random groups) into the lm/glm-based objects from IPMpack. 
Just make 'templates' of the same fixed effect structure as in your 
mixed effects models, and then overwrite the lm/glm-coefs with your 
values (in the growthObj also sigma can be changed). I think for survObj 
and growthObj there's coerce-functions written in IPMpack, but for 
clonalObj or fecObj you need to do it "manually".

Cheers,
Joachim



Den 2017-04-07 12:00 skreiv 
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>    1. survival and growth objects incorporating a random	effect
>       (Klimas, Christie)
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> Message: 1
> Date: Fri, 7 Apr 2017 00:36:12 +0000
> From: "Klimas, Christie" <CKLIMAS at depaul.edu>
> To: "ipmpack-users at lists.r-forge.r-project.org"
> 	<ipmpack-users at lists.r-forge.r-project.org>
> Subject: [Ipmpack-users] survival and growth objects incorporating a
> 	random	effect
> Message-ID:
> 	<8BEDFAD24706E24EB31482A47E4F74E2016F9B74D7 at xmbprd01-dft.dpu.depaul.edu>
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> Content-Type: text/plain; charset="us-ascii"
> 
> I am using IPMpack to model a tropical tree species.
> 
> For my data, a linear model (to represent growth) and a logistic model
> (to represent survival) would both be improved by adding a random
> effect. The survival and growth models: MakeGrowthObj and MakeSurvObj
> call lm (linear model) and glm (logistic models) respectively. I am
> wondering if there are any survival or growth functions already
> written for IPMpack that call lmer and glmer.
> 
> Thanks in advance for your response.
> 
> Best,
> Christie
> 
> Christie Klimas
> DePaul University
> Department of Environmental Science & Studies
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