Message-ID: <038411da8d95468d8ba60e12e1e028a6@BN1PR08MB138.namprd08.prod.outlook.com>
Date: 2014-02-24T16:10:43Z
From: Alex Dunn
Subject: groupedData in nlme
Dear All,
I have a quick question regarding using groupedData in the nlme package.
Can I add more than one predictor in the groupedData formula? I can't seem to get this to work and all the examples in Pinheiro and Bates show just one predictor in the groupedData formula.
Can I use a more complex model when I have only one predictor in the groupedData formula?
Currently I am using the following formula:
grouped<-groupedData(y ~ 1 | ID, data = dataset)
I would like to run the following models:
fixed<-lme(y ~ -1 + x1 + x3 + x3, data = grouped)
randome<-lme(y ~ -1 + x1 + x2 + x3, random = list(~x1|ID, ~x2|ID, ~x3|ID), data=grouped)
Thanks,
Alex