[R] discrete variable

[Andrew Robinson]

Pete,

try

x <- c(0, 3, 4, 3, 15, 5, 6, 5)

table(x)

or

length(table(x))

Cheers

Andrew


On Sun, Mar 02, 2008 at 09:27:20PM +0100, Pete Dorothy wrote:
> Hello,
> 
> I am sorry for asking such a basic question. I could not find an answer to
> it using google.
> 
> I have a discrete variable (a vector x) taking for example the following
> values : 0, 3, 4, 3, 15, 5, 6, 5
> 
> Is it possible to know how many different values (modalities) it takes ?
> Here it takes 6 different values but the length of the vector is 8.
> 
> I would like to know if there is a way to get the set of the
> modalities {0,3,4,15,5,6} with the number of times each one is taken
> {1,2,1,1,2,1}
> 
> Thank you very much
> 
> P.S. : is there some useful functions for discrete variables ?
> 
> 	[[alternative HTML version deleted]]
> 
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-- 
Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-6410
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
http://www.ms.unimelb.edu.au/~andrewpr
http://blogs.mbs.edu/fishing-in-the-bay/