[R] Longitudinal data

[Silvano]

Hi Uwe,

was a great suggestion.

Thanks,

--------------------------------------
Silvano Cesar da Costa
Departamento de Estatística
Universidade Estadual de Londrina
Fone: 3371-4346
--------------------------------------
----- Original Message ----- 
From: "Uwe Ligges" <ligges em statistik.tu-dortmund.de>
To: "Silvano" <silvano em uel.br>
Cc: <r-help em r-project.org>
Sent: Tuesday, December 27, 2011 1:13 PM
Subject: Re: [R] Longitudinal data


>
>
> On 27.12.2011 14:43, Silvano wrote:
>> Hi,
>>
>> I'm analyzing a longitudinal data set with 387 cows were 
>> observed in 63
>> days divided into 6 groups, and every 30 days was found 
>> to produce milk.
>> Does not aim to model the time using regression. Only 
>> compare the groups
>> differ in terms of milk production. There are many 
>> missing observations.
>> Because the data are correlated I used the SAS program:
>>
>> proc mixed data=univar method=reml;
>> class RACA GRUPO APELIDO Dias;
>> model Prod = GRUPO / solution DDFM=BW;
>> repeated Dias / type=arh(1) subject=APELIDO r rcorr;
>> lsmeans GRUPO / pdiff adjust=tukey;
>> run ;
>
>
> See package SASmixed that includes some nice examples how 
> to move from SAS to R.
>
> Uwe Ligges
>
>
>
>> But, I want use R. What would be the equivalent in R?
>>
>> Thank you.
>>
>> --------------------------------------
>> Silvano Cesar da Costa
>> Departamento de Estatística
>> Universidade Estadual de Londrina
>> Fone: 3371-4346
>>
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>