[R] getting the unique values and counts from a vector

From: <Ravi.Vishnu_at_outokumpu.com>
Date: Sat 21 May 2005 - 00:48:28 EST

Hi all,
>From a vector, I want to get the unique values and the counts of these
unique values in the vector. For example, x<-c(2 ,1 ,2, 1, 4 ,2 ,1, 4 ,1 ,1)
for (i in 1:length(xu)) {xn[i]<-length(which(x==xu[i]))} There must be a very much simpler method of doing this. Can somebody direct me to the functions that I must read in order to do operations of these sort.
Ravi Vishnu   

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