[R] Regression with 3 measurement points

Bert Gunter gunter.berton at gene.com
Wed Jan 23 15:36:21 CET 2013

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statistical tutorial site.

-- Bert

On Wed, Jan 23, 2013 at 5:28 AM, Torvon <torvon at gmail.com> wrote:
> Dear R Mailinglist,
> I want to understand how predictors are associated with a dependent
> variable in a regression. I have 3 measurement points. I'm not interested
> in understanding the associations of regressors and the predictor at each
> measurement separately, instead I would like to use the whole sample in one
> regression, "pooling" the measurement points.
> I cannot simply throw them together, because the observations are not
> independent.
> Therefore, I think I need to add time as a regressor. How do I do this in
> R? Google leads me to "time-series analysis" more often than not, but from
> in other statistical programs and longitudinal research, the word
> "time-series" is usually reserved for 5+ measurement points.
> Thank you
> T
>         [[alternative HTML version deleted]]
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Bert Gunter
Genentech Nonclinical Biostatistics

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