[R] count definite categories

[Prof Brian Ripley]

I don't understand what you mean by `definite number' or `definite
categories' (might this be a mis-translation?), but I think you are
looking for table() or unique(), both of which would tell you there were
two categories.

On Sun, 24 Feb 2002, christian wrote:

> Hello,
>
> i  calculate with the formula  conf=Sum(2*Xn^n)
> definite number for binary configurations .
> How it is possible to count the  number of different conf ?
>
> example:
> 384
> 384
> 512
> 512
> 512
>
> the result should be 2  .
>
> Thanks for advance & regards,
> Christian
>
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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