[R] Random slopes in lmer

[Bert Gunter]

???
You were provided exactly what you requested. I think you either need
to read up on what random effects models mean or more clearly
communicate what YOU mean. (It's unclear to me, anyway).

-- 
Bert Gunter
Genentech Nonclinical Statistics

On Thu, Aug 26, 2010 at 8:57 AM, Samantha Patrick
<samantha.patrick at plymouth.ac.uk> wrote:
> Hi
> Thanks for your help - however if I have a model of:
>
> mod1<-lmer(B~ A+C+(A|bird), family=quasibinomial)
>
> coef then gives me an individual slope for factors A and C.  However the random effect is only nested within factor - so I am only trying to allow the slope to vary in relation to effect A
>
> Many Thanks
>
> Sam
>
> Dr Samantha Patrick
> EU INTERREG Post Doc
> Davy 618
> Marine Biology & Ecology Research Centre
> University of Plymouth
> Plymouth
> PL4 8AA
>
> T: 01752 586165
> M: 07740472719
>
>
> -----Original Message-----
> From: Darin A. England [mailto:england at cs.umn.edu]
> Sent: 26 August 2010 16:12
> To: Samantha Patrick
> Cc: r-help at R-project.org
> Subject: Re: [R] Random slopes in lmer
>
> coef(mod1)$bird will give you a matrix with two columns. The first
> column is the intercept for each bird and the second column is the
> slope for each bird.
>
> ranef(mod1) will also give you a matrix of two columns. These
> represent the random effects. That is, how much the intercept (or
> slope) is shifted from overall mean.
>
> HTH,
> Darin
>
> On Thu, Aug 26, 2010 at 01:15:10PM +0100, Samantha Patrick wrote:
>> Hi
>>
>> I want to extract the random slopes from a lmer (I am doing a random regression), but are the answers obtained from ranef or coef?
>>
>> My model is: mod1<-lmer(B~ A +(A|bird), family=quasibinomial)
>>
>> And I want to obtain a slope for each individual bird but am not sure which output I need and can't find the answer anywhere.
>>
>> Thanks
>>
>> Sam
>>
>>
>> Dr Samantha Patrick
>> EU INTERREG Post Doc
>> Davy 618
>> Marine Biology & Ecology Research Centre
>> University of Plymouth
>> Plymouth
>> PL4 8AA
>>
>> T: 01752 586165
>> M: 07740472719
>>
>>
>>       [[alternative HTML version deleted]]
>>
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>
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