Hi Graham,

It is not a good idea you spread the same thread to several list.
The thread break down, and on the future others can't get answers on all the
lists. Anyway, only if you have a very complicated problem (which is not the
case) and you not get answers for long time, may be you try other lists
something plausible.

Happy holidays

milton

On Thu, Dec 24, 2009 at 7:33 AM, Graham Leask <grahamleask@btinternet.com>wrote:

> Dear list
>
> I have a response variable coded 0/1 i.e. a binary response. There are
> 20,000 individual responses that I would like to aggregate into numbers of
> each category (i.e. 0/1) by
> group (350 different groups) and by month (there are several hundred
> responses per month.
>
> What is the simplest way to perform this operation in R?
>
> _______________________________________________
> R-sig-mixed-models@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
>

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